External supercritical carbon dioxide phase change underwater vehicle

Abstract

The invention relates to the technical field of underwater vehicles, in particular to an external supercritical carbon dioxide phase change underwater vehicle. The underwater vehicle comprises a main body part and a drainage device, the main body part is provided with a first shell and a second shell, the first shell is provided with a water ballast space, the first shell is provided with a first end in the front-back direction of the main body part, and the second shell and the first end are at least partially separated to form a containing space; the drainage device is arranged in the containing space and comprises a power unit and a first pressure equalizing unit, the power unit is provided with a first storage cavity, liquid carbon dioxide is stored in the first storage cavity, the first pressure equalizing unit is provided with a first pressure equalizing cavity, and the first storage cavity selectively communicates with the first pressure equalizing cavity. The first pressure equalizing chamber is selectively communicated with the water ballast space; the first pressure equalizing unit is constructed to be an arc-shaped pipe matched with the first arc-shaped face and the second arc-shaped face, and the multiple power units are sequentially arranged in the extending direction of the arc-shaped pipe.

Description

Technical Field

[0001] The present application relates to the technical field of underwater vehicles, and in particular to an external supercritical carbon dioxide phase change underwater vehicle. Background Art

[0002] At present, when underwater vehicles encounter unexpected situations such as rudder jamming, water ingress, and depth loss, it is necessary to quickly discharge part of the stored seawater in a short period of time to provide positive buoyancy and enable the underwater vehicle to float safely. At present, medium and large underwater vehicles mainly use compressed air drainage devices or high-temperature gas drainage devices. As the working depth of underwater vehicles gradually increases, compressed air drainage is greatly affected by back pressure, and the drainage capacity decreases significantly; carbon monoxide, hydrogen and other gases produced by high-temperature gas drainage have the risk of secondary combustion and are not conducive to safety. Summary of the invention

[0003] The present application provides an external supercritical carbon dioxide phase change underwater vehicle, which solves the technical problem of insufficient space in the underwater vehicle cabin and achieves the technical effect that the drainage device does not occupy the space in the underwater vehicle cabin and can be flexibly arranged.

[0004] In order to achieve the above objectives, the main technical solutions adopted in this application include: The embodiment of the present application provides an external supercritical carbon dioxide phase change underwater vehicle, including a main body and a drainage device, the main body having a first shell and a second shell, the first shell being provided with a ballast water tank, along the front-rear direction of the main body, the first shell having a first end, the second shell being provided at the first end, the second shell being at least partially spaced apart from the first end to form a storage space; the drainage device is provided in the storage space, the drainage device comprising a power unit and a first pressure equalizing unit, the power unit having a first storage chamber, the first storage chamber storing liquid carbon dioxide, the The first pressure equalizing unit has a first pressure equalizing chamber, the first storage chamber is selectively connected to the first pressure equalizing chamber, and the first pressure equalizing chamber is selectively connected to the ballast water tank; wherein, along the front-to-back direction, the side surfaces of the second shell and the first end facing each other are respectively constructed as a first arcuate surface and a second arcuate surface, the convex direction of the first arcuate surface is the same as the convex direction of the second arcuate surface, the first pressure equalizing unit is constructed as an arc tube adapted to the first arcuate surface and the second arcuate surface, and there are multiple power units, and the multiple power units are arranged in sequence along the extension direction of the arc tube.

[0005] The drainage device in the external supercritical carbon dioxide phase change underwater vehicle proposed in the embodiment of the present application is arranged in the accommodation space and does not occupy the internal space of the underwater vehicle. Among them, the drainage device includes a power unit and a first pressure equalizing unit, and the first pressure equalizing unit is constructed as an arc tube adapted to the first arc surface and the second arc surface, and multiple power units are arranged in sequence along the extension direction of the arc tube. A rated number of power units can be set according to the drainage needs of the ballast water tank, and then the length of the arc tube is determined according to the number of power units. The length and position of the arc tube can be flexibly adjusted as needed. And the drainage device is arranged on the outside of the main body of the external supercritical carbon dioxide phase change underwater vehicle, which is convenient for maintenance, replacement and inspection after later use.

[0006] Optionally, the arc tube includes a first arc tube and a second arc tube, the first pressure equalizing chamber includes a first sub-pressure equalizing chamber and a second sub-pressure equalizing chamber, the first arc tube is provided with a first sub-pressure equalizing chamber, the second arc tube is provided with a second sub-pressure equalizing chamber, the first arc tube and the second arc tube are both adapted to the first arc surface and the second arc surface; the drainage device includes a first power unit group and a second power unit group, the first power unit group and the second power unit group both include a plurality of the power units, the plurality of the power units of the first power unit group are connected to the first arc tube, and the plurality of the power units of the second power unit group are connected to the second arc tube.

[0007] In the above scheme, the first arc tube and the second arc tube are arranged in parallel, and the first arc tube and the second arc tube are both adapted to the first arc surface and the second arc surface, so as to make full use of the space and reduce the waste of space. The multiple power units of the first power unit group are arranged at intervals along the extension direction of the first arc tube, and the multiple power units of the second power unit group are arranged at intervals along the extension direction of the second arc tube, and multiple power units are arranged to meet different drainage capacities.

[0008] Optionally, the drainage device also includes multiple mounting plates, and the number of the power units in the first power unit group and the number of the power units in the second power unit group are the same as the number of the mounting plates; one axial end of the power unit in the first power unit group is fixed to the first arc tube, and the other axial end is fixed to the corresponding mounting plate, and one axial end of the power unit in the second power unit group is fixed to the second arc tube, and the other axial end is fixed to the corresponding mounting plate.

[0009] In the above scheme, the mounting plate is used to fix the power unit, the two ends of the power unit in the first power unit group are respectively connected to the first arc tube and the mounting plate, and the two ends of the power unit in the second power unit group are respectively connected to the second arc tube and the mounting plate, so as to improve the stability and firmness of the power unit installation.

[0010] Optionally, one axial end of the power unit in the first power unit group is threadedly engaged with the first arc tube, and one axial end of the power unit in the second power unit group is threadedly engaged with the second arc tube; a first mounting hole and a second mounting hole are provided on the mounting plate, and the other axial end of the power unit in the first power unit group is plugged into the first mounting hole, and the other axial end of the power unit in the second power unit group is plugged into the second mounting hole.

[0011] In the above scheme, during the installation and fixing process of the power unit, one axial end of the power unit in the first power unit group is first threadedly engaged with the first arc tube, and the other axial end of the power unit in the first power unit group is then inserted into the first mounting hole, so that the power units in the first power unit group can remain stable; one axial end of the power unit in the second power unit group is first threadedly engaged with the second arc tube, and the other axial end of the power unit in the second power unit group is then inserted into the second mounting hole, so that the power units in the second power unit group can remain stable.

[0012] Optionally, the mounting plate is detachably mounted on the first shell or the second shell.

[0013] In the above solution, the mounting plate is detachably mounted on the first shell or the second shell, and the mounting plate is matched with the first curved surface of the first shell or the second curved surface of the second shell, thereby saving space occupied by the drainage device.

[0014] Optionally, a first anti-rotation mechanism is provided between the other axial end of the power unit in the first power unit group and the corresponding mounting plate, and a second anti-rotation mechanism is provided between the other axial end of the power unit in the second power unit group and the corresponding mounting plate.

[0015] In the above scheme, the first anti-rotation mechanism is used to reduce the rotation of the power units in the first power unit group, so that the installation of the power units in the first power unit group is stable, and the loosening of the threaded fit between the power units in the first power unit group and the first arc tube caused by the rotation of the power units in the first power unit group is reduced, thereby reducing the leakage of carbon dioxide in the power units in the first power unit group. The second anti-rotation mechanism is used to reduce the rotation of the power units in the second power unit group, so that the installation of the power units in the second power unit group is stable, and the loosening of the threaded fit between the power units in the second power unit group and the second arc tube caused by the rotation of the power units in the second power unit group is reduced, thereby reducing the leakage of carbon dioxide in the power units in the second power unit group.

[0016] Optionally, the first anti-rotation mechanism includes a first groove and a first protrusion that cooperate with each other, one of the first groove and the first protrusion is arranged at the other axial end of the power unit in the first power unit group, and the other of the first groove and the first protrusion is arranged on the inner wall of the corresponding first mounting hole; the second anti-rotation mechanism includes a second groove and a second protrusion that cooperate with each other, one of the second groove and the second protrusion is arranged at the other axial end of the power unit in the second power unit group, and the other of the second groove and the second protrusion is arranged on the inner wall of the corresponding second mounting hole.

[0017] In the above scheme, the power units in the first power unit group cooperate with the first mounting hole through the first groove and the first protrusion, thereby reducing the relative rotation between the power units in the first power unit group and the first mounting hole, thereby making the installation of the power units in the first power unit group stable. The power units in the second power unit group cooperate with the second mounting hole through the second groove and the second protrusion, thereby reducing the relative rotation between the power units in the second power unit group and the second mounting hole, thereby making the installation of the power units in the second power unit group stable.

[0018] Optionally, a first anti-rotation gasket is arranged between the other axial end of the power unit in the first power unit group and the corresponding first mounting hole, and a second anti-rotation gasket is arranged between the other axial end of the power unit in the second power unit group and the corresponding second mounting hole.

[0019] In the above scheme, a first anti-rotation gasket is provided between the power unit in the first power unit group and the first mounting hole to reduce the relative rotation between the power unit in the first power unit group and the first mounting hole, thereby making the installation of the power unit in the first power unit group stable. A second anti-rotation gasket is provided between the power unit in the second power unit group and the second mounting hole to reduce the relative rotation between the power unit in the second power unit group and the second mounting hole, thereby making the installation of the power unit in the second power unit group stable.

[0020] Optionally, the drainage device further includes a second pressure equalizing unit, the second pressure equalizing unit having a second pressure equalizing chamber, and the second pressure equalizing chamber is respectively connected to the first pressure equalizing chamber and the ballast water tank.

[0021] In the above scheme, the second pressure equalizing chamber is connected to the first pressure equalizing chamber. The high-pressure supercritical carbon dioxide discharged from the power unit can be further decompressed in the second pressure equalizing chamber after entering the first pressure equalizing chamber, so that the carbon dioxide can be fully buffered in the second pressure equalizing chamber, thereby allowing the carbon dioxide to fully expand.

[0022] Optionally, a partition is provided in the second pressure equalizing unit to separate the second pressure equalizing chamber into a first chamber and a second chamber, the first chamber is connected to the first pressure equalizing chamber, and the second chamber is connected to the ballast water tank, and the partition has a plurality of through holes arranged at intervals, and the through holes connect the first chamber and the second chamber.

[0023] In the above scheme, the carbon dioxide discharged from the power unit enters the first chamber after the first decompression in the first pressure equalization chamber, undergoes a second decompression expansion, and then the carbon dioxide in the first chamber passes through the through holes on the partition, and the through holes on the partition slow down and rectify the carbon dioxide, and then enters the second chamber, and is discharged from the second chamber.

[0024] Optionally, the diameter of the through hole is d, satisfying: 3mm≤d≤5mm.

[0025] In the above scheme, the through hole allows carbon dioxide to pass through quickly and can play a certain barrier role against impurities or participating substances produced by incomplete combustion of the reagent.

[0026] Optionally, the volume of the first cavity is greater than the volume of the second cavity.

[0027] In the above scheme, since the volume of the first chamber is greater than that of the second chamber, after the carbon dioxide enters the first chamber, it is fully decompressed and expanded in the first chamber. The partition slows down the carbon dioxide and then enters the second chamber. The second chamber buffers and equalizes the pressure of the carbon dioxide gas again, limiting the discharge rate of carbon dioxide, thereby allowing the carbon dioxide to fully expand.

[0028] Optionally, the partition is constructed as a cylindrical structure, and the partition includes a circumferential wall and a bottom wall. The bottom wall is arranged at one axial end of the circumferential wall, and the other axial end of the circumferential wall is arranged on the inner wall of the second pressure equalizing chamber. The plurality of through holes are arranged on the circumferential wall and penetrate the circumferential wall along the thickness direction of the circumferential wall.

[0029] In the above scheme, the partition is constructed as a cylindrical structure, and the through hole is arranged on the peripheral wall, which increases the communication area between the first chamber and the second chamber, so that the carbon dioxide in the first chamber can be discharged in time, reducing the excessive accumulation of carbon dioxide in the first chamber, and thus allowing the carbon dioxide to fully expand and be discharged in time for drainage.

[0030] Optionally, the second pressure equalizing unit has a first inlet and a first outlet, the first inlet is connected to the first pressure equalizing unit, the first outlet is connected to the ballast water tank, and the first outlet is closer to the partition than the first inlet; each through hole has a first opening located on the outer surface of the peripheral wall, and the ratio of the sum of the areas of the multiple first openings to the cross-sectional area of ​​the first outlet is c, satisfying: 1.5≤c≤3.

[0031] In the above scheme, the sum of the areas of the first openings of all through holes on the partition, that is, the sum of the cross-sectional areas of all through holes is greater than 1.5 to 3 times the cross-sectional area of ​​the first outlet of the second pressure equalizing unit, so that carbon dioxide can pass through the through holes smoothly and can reduce the clogging of the through holes by impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a schematic diagram of the partial structure of the external supercritical carbon dioxide phase change underwater vehicle of the present application; Figure 2 This is a schematic diagram of the partial structure of the external supercritical carbon dioxide phase change underwater vehicle of the present application; Figure 3 This is a schematic diagram of the structure of the drainage device for this application; Figure 4 This is a schematic diagram of the structure of the second pressure balancing unit of the present application; Figure 5 This is a schematic diagram of the connection structure between the power unit and the mounting plate in one embodiment of the present application; Figure 6 This is a schematic diagram of the connection structure between the power unit and the mounting plate in another embodiment of the present application; Figure 7 This is a schematic diagram of the partial structure of the external supercritical carbon dioxide phase change underwater vehicle in this application.

[0034] [Description of Reference Numerals] 1: main body; 11: first shell; 111: first end; 12: second shell; 10: accommodation space; 13: ballast water tank; 2: drainage device; 21: power unit; 22: first pressure equalizing unit; 221: first arc tube; 222: second arc tube; 23: second pressure equalizing unit; 231: partition; 2310: through hole; 2311: peripheral wall; 2312: bottom wall; 232: first cavity; 233: second cavity; 234: first inlet; 235: first outlet; 3: mounting plate; 31: first mounting hole; 32: second mounting hole; 4: diversion components; 51: first protrusion; 52: second protrusion; 61: first anti-rotation gasket; 62: second anti-rotation gasket.

[0035] 7: Carbon dioxide recovery device; 71: Gas-liquid separation component; 72: Gas capture component; 73: Recovery chamber; 74: Cooling component; 75: Compression component. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0038] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0041] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0042] Currently, when an underwater vehicle encounters unexpected situations such as rudder jamming, water ingress, or falling depth, it is necessary to quickly discharge some of the stored seawater in a short period of time to provide positive buoyancy and enable the underwater vehicle to float safely.

[0043] At present, medium and large underwater vehicles mainly use compressed air drainage devices or high-temperature gas drainage devices. The compressed air drainage device compresses and pressurizes the air in advance and stores it in a high-pressure air bottle. When needed, open the valve on the pipeline connecting the air bottle and the storage water tank to introduce high-pressure air into the water tank to discharge the internal seawater; the high-temperature gas drainage device seals the solid agent in the gas generator. When needed, the agent is ignited by an electrical signal to cause a chemical reaction in the agent to form high-temperature gas, which is injected into the water tank to discharge the internal seawater.

[0044] As the working depth of underwater vehicles gradually increases, compressed air drainage is greatly affected by back pressure and the drainage capacity decreases significantly; the carbon monoxide, hydrogen and other gases produced by high-temperature fuel gas drainage have the risk of secondary combustion, which is not conducive to safety.

[0045] Therefore, underwater vehicles need a safe, efficient, and strong drainage device to provide new protection for the navigation safety of underwater vehicles. However, since the drainage device occupies a large space, the space inside the vehicle is insufficient. Therefore, an external supercritical carbon dioxide phase change underwater vehicle is needed, and the drainage device of the external supercritical carbon dioxide phase change underwater vehicle does not occupy the internal space of the external supercritical carbon dioxide phase change underwater vehicle.

[0046] The present application embodiment provides an external supercritical carbon dioxide phase change underwater vehicle, referring to Figures 1 to 3The external supercritical carbon dioxide phase change underwater vehicle comprises a main body 1 and a drainage device 2. The main body 1 comprises a first shell 11 and a second shell 12. The first shell 11 is provided with a ballast water tank 13. Along the front and rear direction of the main body 1, the first shell 11 has a first end 111, and the second shell 12 is provided at the first end 111. The second shell 12 is at least partially separated from the first end 111 to form a receiving space 10. The drainage device 2 is provided in the receiving space 10. The drainage device 2 comprises a power unit 21 and a first pressure equalizing unit 22. The power unit 21 has a first storage chamber, and the first storage chamber The chamber stores liquid carbon dioxide, the first pressure equalizing unit 22 has a first pressure equalizing chamber, the first storage chamber is selectively connected to the first pressure equalizing chamber, and the first pressure equalizing chamber is selectively connected to the ballast water tank 13; wherein, along the front-to-back direction, the sides of the second shell 12 and the first end 111 facing each other are respectively constructed as a first curved surface and a second curved surface, the convex direction of the first curved surface and the convex direction of the second curved surface are the same, the first pressure equalizing unit 22 is constructed as an arc tube adapted to the first curved surface and the second curved surface, there are multiple power units 21, and the multiple power units 21 are arranged in sequence along the extension direction of the arc tube.

[0047] Along the front-to-back direction of the main body 1, the second shell 12 is at least partially separated from the first end 111, and the second shell 12 can be separated from the middle part of the first end 111, and the second shell 12 is connected to both ends of the first end 111 to form a receiving space 10 between the second shell 12 and the first end 111. Alternatively, the second shell 12 is connected to the middle part of the first end 111, and the second shell 12 is separated from both ends of the first end 111. The specific connection position of the second shell 12 and the first end 111 depends on the specific situation.

[0048] Liquid carbon dioxide is stored in the first storage chamber. Carbon dioxide is liquid at a certain pressure and temperature, has a high density, and is easy to store. Liquid carbon dioxide can be quickly converted to a supercritical state by increasing temperature and pressure, and its volume expands several times. It has strong instantaneous work capacity and is non-toxic and pollution-free. It is a new type of drainage technology. After the liquid carbon dioxide in the first storage chamber is converted into supercritical carbon dioxide, its volume expands greatly. Liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide to achieve expansion work and drainage. It has strong drainage capacity and is safe and reliable.

[0049] The first storage chamber of the power unit 21 is selectively connected to the first pressure equalizing chamber, and the first pressure equalizing chamber can decompress the carbon dioxide discharged from the first storage chamber. The pressure of the carbon dioxide discharged from the first storage chamber is very high, and the gas with higher pressure enters the first pressure equalizing chamber. At this time, the volume of the carbon dioxide with higher pressure can further expand in the first pressure equalizing chamber. Afterwards, the decompressed carbon dioxide can be discharged from the first pressure equalizing chamber to the ballast water tank 13 for drainage.

[0050] The main body 1 of the external supercritical carbon dioxide phase change underwater vehicle proposed in the embodiment of the present application comprises a first shell 11 and a second shell 12, a ballast water tank 13 is provided inside the first shell 11, the second shell 12 is provided outside the first end 111 of the first shell 11, and a receiving space 10 is formed between the second shell 12 and the first end 111 of the first shell 11. The drainage device 2 is arranged in the receiving space 10 and does not occupy the internal space of the external supercritical carbon dioxide phase change underwater vehicle.

[0051] The drainage device 2 includes a power unit 21 and a first pressure equalizing unit 22. The first pressure equalizing unit 22 is constructed as an arc-shaped tube adapted to the first arc surface and the second arc surface. A plurality of power units 21 are arranged in sequence along the extension direction of the arc-shaped tube. A rated number of power units 21 can be set according to the drainage needs of the ballast water tank 13, and the length of the arc-shaped tube is determined according to the number of power units 21. The length and position of the arc-shaped tube can be flexibly adjusted as needed. In addition, the drainage device 2 is arranged outside the main body 1 of the external supercritical carbon dioxide phase change underwater vehicle, which is convenient for maintenance, replacement and inspection after later use.

[0052] The arc tube is connected to multiple power units 21 to form a whole. The arc tube provides an installation interface for the power unit 21. Along the direction from the first shell 11 to the second shell 12, the arc tube can be one group or multiple groups arranged in parallel to adapt to different spaces. At the same time, the first pressure equalizing chamber in the arc tube reduces the pressure of the high-pressure supercritical carbon dioxide discharged from the power unit 21.

[0053] In a specific embodiment, the first shell 11 of the main body 1 is a pressure-resistant shell, and the second shell 12 is a water-permeable outer shell. The first end 111 of the first shell 11 can be the bow or tail of the underwater drainer. The first end 111 of the first shell 11 is spaced apart from the second shell 12 and forms a accommodating space 10. The drainage device 2 is arranged in the accommodating space 10 to make full use of the space of the external supercritical carbon dioxide phase change underwater vehicle and reduce space waste.

[0054] In a specific embodiment, each power unit 21 is provided with an excitation agent, which can be connected to an external control unit for communication. After receiving the excitation signal from the control unit, the excitation agent undergoes a chemical reaction to generate heat, causing the liquid carbon dioxide to absorb heat and undergo a phase change to be converted into high-pressure supercritical carbon dioxide.

[0055] A pressure relief unit is provided at the connection between each power unit 21 and the arc tube, and the pressure relief unit is configured to rupture when the pressure in the first storage chamber is greater than a preset value, so as to connect the first storage chamber with the first pressure equalizing chamber. The pressure relief unit can be a one-way valve, and the pressure threshold of the one-way valve is determined. When the pressure in the storage chamber is large enough and exceeds the above pressure threshold, the pressure relief unit opens, thereby connecting the first storage chamber with the first pressure equalizing chamber. Thus, high-pressure gaseous carbon dioxide can enter the first pressure equalizing chamber for decompression, and then be discharged to the ballast water tank 13 for drainage.

[0056] Optionally, refer to Figure 1 and Figure 3 The arc tube includes a first arc tube 221 and a second arc tube 222, the first pressure equalizing chamber includes a first sub-pressure equalizing chamber and a second sub-pressure equalizing chamber, the first arc tube 221 is provided with a first sub-pressure equalizing chamber, the second arc tube 222 is provided with a second sub-pressure equalizing chamber, the first arc tube 221 and the second arc tube 222 are both adapted to the first arc surface and the second arc surface; the drainage device 2 includes a first power unit group and a second power unit group, the first power unit group and the second power unit group both include a plurality of power units 21, the plurality of power units 21 of the first power unit group are connected to the first arc tube 221, and the plurality of power units 21 of the second power unit group are connected to the second arc tube 222.

[0057] The first arc tube 221 and the second arc tube 222 are arranged in parallel, and the first arc tube 221 and the second arc tube 222 are both adapted to the first arc surface and the second arc surface, making full use of space and reducing space waste. The multiple power units 21 of the first power unit group are arranged at intervals along the extension direction of the first arc tube 221, and the multiple power units 21 of the second power unit group are arranged at intervals along the extension direction of the second arc tube 222. Multiple power units 21 are arranged to meet different drainage capacities.

[0058] In practical applications, the number of the first power unit group and the second power unit group and the length of the first arc tube 221 and the second arc tube 222 can be determined according to actual needs. The design is flexible and does not occupy the internal space of the external supercritical carbon dioxide phase change underwater vehicle.

[0059] The first arc pipe 221 and the second arc pipe 222 may be connected via a Y-shaped pipe and then connected to the ballast water tank 13 .

[0060] Optionally, refer to Figure 1The drainage device 2 also includes multiple mounting plates 3, and the number of power units 21 in the first power unit group and the number of power units 21 in the second power unit group are the same as the number of mounting plates 3; one axial end of the power unit 21 in the first power unit group is fixed to the first arc tube 221, and the other axial end is fixed to the corresponding mounting plate 3, and one axial end of the power unit 21 in the second power unit group is fixed to the second arc tube 222, and the other axial end is fixed to the corresponding mounting plate 3.

[0061] The mounting plate 3 is used to fix and install the power unit 21. The two ends of the power unit 21 in the first power unit group are respectively connected to the first arc tube 221 and the mounting plate 3, and the two ends of the power unit 21 in the second power unit group are respectively connected to the second arc tube 222 and the mounting plate 3, so as to improve the stability and firmness of the installation of the power unit 21. The setting of the mounting plate 3 is adapted to the first arc surface and the second arc surface to adapt to different positions of the accommodating space 10.

[0062] Optionally, one axial end of the power unit 21 in the first power unit group is threadedly engaged with the first arc tube 221, and one axial end of the power unit 21 in the second power unit group is threadedly engaged with the second arc tube 222; a first mounting hole 31 and a second mounting hole 32 are provided on the mounting plate 3, and the other axial end of the power unit 21 in the first power unit group is inserted into the first mounting hole 31, and the other axial end of the power unit 21 in the second power unit group is inserted into the second mounting hole 32.

[0063] During the installation and fixing process of the power unit 21, one axial end of the power unit 21 in the first power unit group is first threadedly engaged with the first arc tube 221, and the other axial end of the power unit 21 in the first power unit group is then inserted into the first mounting hole 31, so that the power unit 21 in the first power unit group can remain stable; one axial end of the power unit 21 in the second power unit group is first threadedly engaged with the second arc tube 222, and the other axial end of the power unit 21 in the second power unit group is then inserted into the second mounting hole 32, so that the power unit 21 in the second power unit group can remain stable.

[0064] Optionally, the mounting plate 3 is detachably mounted on the first shell 11 or the second shell 12. The mounting plate 3 is detachably mounted on the first shell 11 or the second shell 12, and the mounting plate 3 is adapted to the first curved surface of the first shell 11 or the second curved surface of the second shell 12, saving space occupied by the drainage device 2.

[0065] Optionally, a first anti-rotation mechanism is provided between the other axial end of the power unit 21 in the first power unit group and the corresponding mounting plate 3, and a second anti-rotation mechanism is provided between the other axial end of the power unit 21 in the second power unit group and the corresponding mounting plate 3.

[0066] The first anti-rotation mechanism is used to reduce the rotation of the power unit 21 in the first power unit group, so that the installation of the power unit 21 in the first power unit group is stable, and the loosening of the threaded fit between the power unit 21 in the first power unit group and the first arc tube 221 caused by the rotation of the power unit 21 in the first power unit group is reduced, thereby reducing the leakage of carbon dioxide in the power unit 21 in the first power unit group. The second anti-rotation mechanism is used to reduce the rotation of the power unit 21 in the second power unit group, so that the installation of the power unit 21 in the second power unit group is stable, and the loosening of the threaded fit between the power unit 21 in the second power unit group and the second arc tube 222 caused by the rotation of the power unit 21 in the second power unit group is reduced, thereby reducing the leakage of carbon dioxide in the power unit 21 in the second power unit group.

[0067] Optionally, refer to Figure 5 The first anti-rotation mechanism includes a first groove and a first protrusion 51 that cooperate with each other, one of the first groove and the first protrusion 51 is arranged at the other axial end of the power unit 21 in the first power unit group, and the other of the first groove and the first protrusion 51 is arranged on the inner wall of the corresponding first mounting hole 31; the second anti-rotation mechanism includes a second groove and a second protrusion 52 that cooperate with each other, one of the second groove and the second protrusion 52 is arranged at the other axial end of the power unit 21 in the second power unit group, and the other of the second groove and the second protrusion 52 is arranged on the inner wall of the corresponding second mounting hole 32.

[0068] The power unit 21 in the first power unit group cooperates with the first mounting hole 31 through the first groove and the first protrusion 51, thereby reducing the relative rotation between the power unit 21 in the first power unit group and the first mounting hole 31, thereby making the installation of the power unit 21 in the first power unit group stable. The first groove can be provided on the power unit 21 in the first power unit group, and the first protrusion 51 is provided on the inner wall of the first mounting hole 31; or the first protrusion 51 can be provided on the power unit 21 in the first power unit group, and the first groove is provided on the inner wall of the first mounting hole 31.

[0069] The power unit 21 in the second power unit group cooperates with the second mounting hole 32 through the second groove and the second protrusion 52, thereby reducing the relative rotation between the power unit 21 in the second power unit group and the second mounting hole 32, thereby making the installation of the power unit 21 in the second power unit group stable. The second groove can be provided on the power unit 21 in the second power unit group, and the second protrusion 52 is provided on the inner wall of the second mounting hole 32; or the second protrusion 52 can be provided on the power unit 21 in the second power unit group, and the second groove is provided on the inner wall of the second mounting hole 32.

[0070] Optionally, refer to Figure 6 A first anti-rotation gasket 61 is arranged between the other axial end of the power unit 21 in the first power unit group and the corresponding first mounting hole 31, and a second anti-rotation gasket 62 is arranged between the other axial end of the power unit 21 in the second power unit group and the corresponding second mounting hole 32.

[0071] A first anti-rotation gasket 61 is provided between the power unit 21 in the first power unit group and the first mounting hole 31 to reduce the relative rotation between the power unit 21 in the first power unit group and the first mounting hole 31, thereby making the installation of the power unit 21 in the first power unit group stable. A second anti-rotation gasket 62 is provided between the power unit 21 in the second power unit group and the second mounting hole 32 to reduce the relative rotation between the power unit 21 in the second power unit group and the second mounting hole 32, thereby making the installation of the power unit 21 in the second power unit group stable.

[0072] In a specific embodiment, the first mounting hole 31 and the second mounting hole 32 can be set as circular holes or regular hexagonal holes. The cross-section of the outer peripheral surface of the power unit 21 at least where it is connected to the first mounting hole 31 and the second mounting hole 32 is circular or regular hexagonal. If the outer peripheral surface of the power unit 21 is circular, the first mounting hole 31 and the second mounting hole 32 can be set as regular hexagonal holes to reduce the relative rotation between the power unit 21 and the first mounting hole 31 or the second mounting hole 32; or, if the outer peripheral surface of the power unit 21 is a regular hexagon, the first mounting hole 31 and the second mounting hole 32 can also be set as regular hexagonal holes to reduce the relative rotation between the power unit 21 and the first mounting hole 31 or the second mounting hole 32.

[0073] Optionally, refer to Figure 1 and Figure 3 The drainage device 2 also includes a second pressure equalizing unit 23, which has a second pressure equalizing chamber, and the second pressure equalizing chamber is connected to the first pressure equalizing chamber and the ballast water tank 13 respectively.

[0074] The carbon dioxide in the first storage chamber enters the first pressure equalizing chamber for the first decompression and then enters the second pressure equalizing chamber. At this time, the volume of the carbon dioxide with a higher pressure can undergo a second decompression and expansion in the second pressure equalizing chamber. The decompressed carbon dioxide can be discharged from the second decompression chamber to the ballast water tank 13.

[0075] That is to say, the second pressure equalizing chamber is connected to the first pressure equalizing chamber, and the high-pressure carbon dioxide discharged from the power unit 21 can be further decompressed in the second pressure equalizing chamber after entering the first pressure equalizing chamber, so that the carbon dioxide can be fully buffered in the second pressure equalizing chamber, thereby allowing the carbon dioxide to fully expand.

[0076] Optionally, refer to Figure 4 A partition 231 is provided in the second pressure equalizing unit 23 to separate the second pressure equalizing chamber into a first chamber 232 and a second chamber 233. The first chamber 232 is connected to the first pressure equalizing chamber, and the second chamber 233 is connected to the ballast water tank 13. The partition 231 has a plurality of through holes 2310 arranged at intervals, and the through holes 2310 connect the first chamber 232 and the second chamber 233.

[0077] A partition 231 is provided in the second pressure equalizing chamber, and a plurality of through holes 2310 are provided at intervals on the partition 231, dividing the second pressure equalizing chamber into a first chamber 232 and a second chamber 233. The carbon dioxide discharged from the power unit 21 enters the first chamber 232 after undergoing the first decompression in the first pressure equalizing chamber, undergoes the second decompression expansion, and then the carbon dioxide in the first chamber 232 passes through the through holes 2310 on the partition 231, and the through holes 2310 on the partition 231 decelerate and rectify the carbon dioxide, and then enters the second chamber 233, and is discharged from the second chamber 233.

[0078] Optionally, the diameter of the through hole 2310 is d, which satisfies: 3mm≤d≤5mm, so that carbon dioxide can pass through quickly and can play a certain role in blocking impurities or participating substances generated by incomplete combustion of the agent.

[0079] The through hole 2310 diffuses the high-pressure carbon dioxide for a second time, so as to mix the medium better and more evenly. The diameter of the through hole 2310 should not be too small or too large. If the diameter of the through hole 2310 is too small, it will affect the passage of gas; if the diameter of the through hole 2310 is too large, the number of through holes 2310 provided on the partition 231 of the same area will be reduced, which is not conducive to the even diffusion of the carbon dioxide medium.

[0080] Among them, the diameter d of the through hole 2310 can be 3mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.5mm, 4.6mm, 4.8mm, 4.9mm or 5mm.

[0081] Optionally, the volume of the first cavity 232 is greater than the volume of the second cavity 233 .

[0082] The carbon dioxide discharged from the power unit 21 enters the first chamber 232 after the first pressure equalization chamber is decompressed for the first time, and then enters the second chamber 233 after the carbon dioxide in the first chamber 232 passes through the through hole 2310 on the partition 231, and the through hole 2310 on the partition 231 decelerates and rectifies the carbon dioxide. Since the volume of the first chamber 232 is greater than the volume of the second chamber 233, after the carbon dioxide enters the first chamber 232, it is decompressed and expanded in stages in the first chamber 232, and the partition 231 decelerates the carbon dioxide and then enters the second chamber 233. The second chamber 233 buffers and equalizes the carbon dioxide again, limits the discharge rate of the carbon dioxide, and thus allows the carbon dioxide to fully expand.

[0083] Optionally, refer to Figure 4 The partition 231 is constructed as a cylindrical structure, and the partition 231 includes a peripheral wall 2311 and a bottom wall 2312. The bottom wall 2312 is arranged at one axial end of the peripheral wall 2311, and the other axial end of the peripheral wall 2311 is arranged on the inner wall of the second pressure equalizing chamber. A plurality of through holes 2310 are arranged on the peripheral wall 2311 and penetrate the peripheral wall 2311 along the thickness direction of the peripheral wall 2311.

[0084] The partition 231 is constructed as a cylindrical structure and is arranged in the second pressure equalizing chamber, and a bottom wall 2312 is provided at one end of a peripheral wall 2311 of the cylindrical structure, and the peripheral wall 2311 is connected to the inner wall of the second pressure equalizing chamber, and a through hole 2310 is arranged on the peripheral wall 2311 and penetrates the peripheral wall 2311. When carbon dioxide passes through the through hole 2310 from the first chamber 232 into the second chamber 233, the through hole 2310 on the peripheral wall 2311 decelerates and decompresses the carbon dioxide. The partition 231 is constructed as a cylindrical structure, and the through hole 2310 is arranged on the peripheral wall 2311, which increases the communication area between the first chamber 232 and the second chamber 233, so that the carbon dioxide in the first chamber 232 can be discharged in time, and the excessive accumulation of carbon dioxide in the first chamber 232 is reduced, so that the carbon dioxide can be fully expanded and discharged in time for drainage.

[0085] In a specific embodiment, a plurality of through holes 2310 are disposed on the peripheral wall 2311 and the bottom wall 2312 of the partition 231 .

[0086] Optionally, refer to Figure 4 The second pressure equalizing unit 23 has a first inlet 234 and a first outlet 235. The first inlet 234 is connected to the first pressure equalizing unit 22, and the first outlet 235 is connected to the ballast water tank 13. The first outlet 235 is closer to the partition 231 than the first inlet 234. Each through hole 2310 has a first opening located on the outer surface of the peripheral wall 2311. The ratio of the sum of the areas of the multiple first openings to the cross-sectional area of ​​the first outlet 235 is c, satisfying: 1.5≤c≤3.

[0087] The second pressure equalizing unit 23 has a first inlet 234 and a first outlet 235. The first inlet 234 is in communication with the first pressure equalizing chamber, and the first outlet 235 is in communication with the ballast water tank 13. The first inlet 234 is in communication with the first chamber 232, and the first outlet 235 is in communication with the second chamber 233. The inner diameter of the first inlet 234 is greater than the inner diameter of the first outlet 235, so that the carbon dioxide entering the second pressure equalizing chamber from the first inlet 234 can be released more smoothly from the first outlet 235.

[0088] The sum of the areas of the first openings of all through holes 2310 on the partition 231, that is, the sum of the cross-sectional areas of all through holes 2310 is greater than 1.5 to 3 times the cross-sectional area of ​​the first outlet 235 of the second pressure equalizing unit 23, so that the carbon dioxide gas can smoothly pass through the through holes 2310 and can reduce the clogging of the through holes 2310 by impurities. The impurities mainly come from impurities or participating substances generated by incomplete combustion of the excitation agent.

[0089] Herein, a ratio c of the sum of the areas of the plurality of first openings to the area of ​​the cross section of the first outlet 235 may be 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 or 3.0.

[0090] In a specific embodiment, a through-hole dynamic adjustment portion is provided on the partition 231, and the dynamic adjustment portion corresponds one-to-one to each through-hole 2310. The control unit dynamically adjusts the diameter of the through-hole 2310 according to the pressure difference on both sides of the partition 231 to achieve precise decompression. At the same time, by optimizing the diameter of the through-hole 2310, the energy loss of the fluid when passing through the partition 231 is reduced, thereby improving the decompression efficiency.

[0091] The through hole dynamic adjustment part may be a mechanical adjustment device, such as an adjustment ring driven by a micro motor provided on the partition 231, which changes the diameter of the through hole 2310 through mechanical movement. When the pressure sensors on both sides of the partition 231 detect that the pressure difference on both sides of the partition 231 increases, the control unit drives the motor to move the adjustment ring outward, the diameter of the through hole 2310 increases, and the pressure difference on both sides of the partition 231 is reduced. When the pressure difference is too small, the driving motor moves the adjustment ring inward, the diameter of the through hole 2310 decreases, and the system pressure is maintained.

[0092] The through hole dynamic adjustment part can also be a shape memory alloy. When the pressure sensors on both sides of the partition 231 detect that the pressure difference on both sides of the partition 231 increases, the control unit heats the alloy sheet to expand it, and the diameter of the through hole 2310 increases to reduce the flow resistance. When the pressure difference decreases, the heating is stopped, the alloy sheet cools and shrinks, and the diameter of the through hole 2310 decreases to maintain the stability of the system.

[0093] The through-hole dynamic adjustment part can also be a piezoelectric ceramic regulator, with a piezoelectric ceramic sheet embedded in the edge of each through-hole 2310 of the partition 231, and the ceramic sheet is connected to a power source. When the flow sensor detects that the flow through the through-hole 2310 is too large, the control unit applies a voltage to expand the ceramic sheet, reduce the diameter of the through-hole 2310, and limit the flow. When the flow is too small, the voltage is reduced to shrink the ceramic sheet, increase the diameter of the through-hole 2310, and increase the flow.

[0094] In another specific embodiment, a self-cleaning structure, such as an ultrasonic cleaner, a micro brush or a scraper, is disposed around the through hole 2310 of the partition 231 .

[0095] Specifically, a plurality of ultrasonic transducers are installed on the surface of the partition 231, and the ultrasonic transducers are connected to the ultrasonic generator. When the pressure sensors on both sides of the partition 231 detect that the pressure difference on both sides of the partition 231 increases, the control unit starts the ultrasonic generator, and the ultrasonic generator generates an ultrasonic signal and transmits the ultrasonic signal to the ultrasonic transducer, and the ultrasonic transducer converts the ultrasonic signal into mechanical vibration energy, thereby removing impurities around the through hole 2310.

[0096] Alternatively, an annular micro brush or scraper is arranged around each through hole 2310 of the partition 231, and the micro brush is driven by a motor. When the flow sensors on both sides of the partition 231 detect that the flow through the through hole 2310 decreases, the control unit starts the motor, and the micro brush or scraper rotates to remove the attached matter.

[0097] By providing a self-cleaning structure to clean the partition 231, the blockage of the through hole 2310 by impurities is reduced, thereby improving the pressure reduction efficiency.

[0098] In a specific embodiment, the second pressure equalizing unit 23 is connected to the arc tube, and the cross-sectional areas of the first arc tube 221 and the second arc tube 222 are both smaller than the cross-sectional area of ​​the second pressure equalizing unit 23. After the carbon dioxide enters the second pressure equalizing unit 23, the local cross-sectional area suddenly increases, resulting in a local pressure drop. The cross-sectional area of ​​the first outlet 235 of the second pressure equalizing unit 23 is smaller than half of the cross-sectional area of ​​the first inlet 234, so that the emission rate of the carbon dioxide gas is more stable.

[0099] In a specific embodiment, the cross-sectional area of ​​the first inlet 234 of the second pressure equalizing unit 23 is smaller than the cross-sectional area of ​​the outlet of the power unit 21 to control the flow rate of carbon dioxide.

[0100] In a specific embodiment, the drainage device 2 further includes a flow guide component 4, which is connected to the second pressure equalization chamber through a third arc-shaped pipe, and is arranged on the top of the ballast water tank 13. The flow guide component 4 can prevent seawater from entering the interior of the flow guide component 4, and the interior of the flow guide component 4 has multiple layers of annular holes, which can rectify and slow down the flow of carbon dioxide, so that the carbon dioxide can be discharged into the ballast water tank 13 at a relatively gentle pressure.

[0101] The third arc tube can connect the flow guide assembly 4 and the second pressure equalizing unit 23 , and the shape of the third arc tube can be adjusted according to specific needs to adapt to different spaces.

[0102] In an alternative embodiment, reference Figure 7 The drainage device 2 further includes a carbon dioxide recovery device 7, which includes a gas-liquid separation component 71, a gas capture component 72, a recovery chamber 73, a cooling component 74, a compression component 75, and a storage component. The gas-liquid separation component 71 is disposed between the ballast water tank 13 and the drainage port, the gas capture component 72 is communicated with the chamber of the gas-liquid separation component 71, the recovery chamber 73 is communicated with the gas capture component 72, the cooling component 74 is disposed in the recovery chamber 73, the compression component 75 is disposed at the outlet of the recovery chamber 73, and the storage component may be a high-pressure storage tank for collecting and storing carbon dioxide.

[0103] Specifically, a gas-liquid separation component 71 is provided between the ballast water tank 13 and the drain port, and the gas-liquid separation component 71 is connected to the gas capture component 72. The gas capture component 72 prevents gas from escaping through physical isolation (such as an elastic airbag) and collects the gas in the elastic airbag. When draining, the gas-liquid mixture enters the chamber of the gas-liquid separation component 71, the liquid sinks due to gravity and is discharged from the bottom, and the gas is collected by the gas capture component 72.

[0104] The gas collected by the gas capture assembly 72 enters the recovery chamber 73. The cooling assembly 74 is arranged in the recovery chamber 73, which may be a cooling coil or a cooling fan to cool the high-temperature carbon dioxide. The compression assembly 75 may be a compression pump or a compressor to compress the gas discharged from the recovery chamber 73, thereby collecting the compressed carbon dioxide in the storage assembly.

[0105] Among them, the storage component can be a power unit 21, the compression component 75 is connected to the power unit 21 through a pipeline, and a valve is arranged between the compression component 75 and the power unit 21. When the carbon dioxide in a power unit 21 is emptied, the control unit controls the valve to open, so that the carbon dioxide recovered in the carbon dioxide recovery device 7 is collected in the power unit 21, thereby realizing the reuse of carbon dioxide, reducing operating costs, and being able to reduce carbon dioxide emissions and reduce the impact of carbon dioxide on marine ecology.

[0106] In another optional embodiment, considering energy recovery, a heat recovery component is arranged inside the flow guide component 4, and the heat recovery component includes a shell and tube type, plate type or fin type heat exchanger, and the heat exchanger is made of corrosion-resistant and high-pressure resistant materials. The heat recovery component also includes a heat storage unit and a heat conversion unit. The heat transfer medium in the heat exchanger absorbs waste heat, increases the temperature, and transfers the heat to the heat storage unit. The heat storage unit stores the recovered heat energy through a phase change material heat storage tank or a hot water storage tank. The heat conversion unit can be a thermoelectric generator or a steam turbine to convert heat energy into electrical energy, thereby increasing the endurance of the external supercritical carbon dioxide phase change underwater vehicle.

[0107] The drainage device 2 in the present application is arranged in the accommodating chamber between the first shell 11 and the second shell 12, and does not occupy the internal space of the external supercritical carbon dioxide phase change underwater vehicle. The first pressure equalizing unit 22 of the drainage device 2 is constructed as an arc tube adapted to the shape of the first shell 11 and the second shell 12, and one or more arc tubes are stacked to adapt to different spaces. At the same time, since the volume in the first pressure equalizing chamber of the arc tube is larger than the volume in the first storage chamber in the power unit 21, such as the volume in the first pressure equalizing chamber is 5-10 times the volume in the first storage chamber. The first pressure equalizing chamber decompresses the carbon dioxide for the first time.

[0108] When there are multiple arc-shaped tubes, the multiple arc-shaped tubes can be connected by a special-shaped tube such as a Y-shaped tube, and then connected to the second pressure equalizing chamber. The second pressure equalizing unit 23 has a first inlet 234 and a first outlet 235, the first inlet 234 is connected to the first pressure equalizing chamber, and the first inlet 234 is connected to the first cavity 232; the first outlet 235 is connected to the guide component 4, and the first outlet 235 is connected to the second cavity 233.

[0109] The second pressure equalizing chamber is connected to the first pressure equalizing chamber. After the high-pressure carbon dioxide discharged from the power unit 21 enters the first pressure equalizing chamber and is decompressed, the carbon dioxide enters the first chamber 232 from the first inlet 234, and the carbon dioxide is decompressed again in the first chamber 232. Then, the carbon dioxide decelerates and enters the second chamber 233 through the through hole 2310 on the partition 231. Since the inner diameter of the first inlet 234 is larger than the inner diameter of the first outlet 235, and the inner diameter of the first chamber 232 is larger than the inner diameter of the second chamber 233, the amount of carbon dioxide entering the second pressure equalizing chamber can be discharged from the second chamber 233 more smoothly, which is beneficial to the working stability of the entire device.

[0110] The carbon dioxide discharged from the second pressure equalizing chamber is discharged from the first outlet 235 through the third arc-shaped pipe to the guide assembly 4, and is decelerated and rectified by the guide assembly 4 before being sprayed into the ballast water tank 13, thereby achieving drainage.

[0111] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0112] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0113] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0114] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An external supercritical carbon dioxide phase change underwater vehicle, characterized in that: include: A main body, the main body having a first shell and a second shell, the first shell being provided with a ballast water tank, the first shell having a first end along the front-rear direction of the main body, the second shell being provided at the first end, the second shell being at least partially spaced apart from the first end to form a receiving space; a drainage device, arranged in the accommodating space, the drainage device comprising a power unit and a first pressure equalizing unit, the power unit having a first storage chamber, the first storage chamber storing liquid carbon dioxide, the first pressure equalizing unit having a first pressure equalizing chamber, the first storage chamber being selectively connected to the first pressure equalizing chamber, and the first pressure equalizing chamber being selectively connected to the ballast water tank; Among them, along the front-to-back direction, the side surfaces of the second shell and the first end facing each other are respectively constructed as a first curved surface and a second curved surface, the convex direction of the first curved surface is the same as the convex direction of the second curved surface, the first pressure equalizing unit is constructed as an arc tube adapted to the first curved surface and the second curved surface, and there are multiple power units, and the multiple power units are arranged in sequence along the extension direction of the arc tube.

2. The external supercritical carbon dioxide phase change underwater vehicle according to claim 1, characterized in that: The arc tube includes a first arc tube and a second arc tube, the first pressure equalizing chamber includes a first sub-pressure equalizing chamber and a second sub-pressure equalizing chamber, the first arc tube is provided with a first sub-pressure equalizing chamber, the second arc tube is provided with a second sub-pressure equalizing chamber, and the first arc tube and the second arc tube are both adapted to the first arc surface and the second arc surface; The drainage device includes a first power unit group and a second power unit group, each of the first power unit group and the second power unit group includes a plurality of the power units, the plurality of the power units of the first power unit group are connected to the first arc tube, and the plurality of the power units of the second power unit group are connected to the second arc tube.

3. The external supercritical carbon dioxide phase change underwater vehicle according to claim 2 is characterized in that: The drainage device further comprises a plurality of mounting plates, and the number of the power units in the first power unit group and the number of the power units in the second power unit group are both the same as the number of the mounting plates; One axial end of the power unit in the first power unit group is fixed to the first arc tube, and the other axial end is fixed to the corresponding mounting plate. One axial end of the power unit in the second power unit group is fixed to the second arc tube, and the other axial end is fixed to the corresponding mounting plate.

4. The external supercritical carbon dioxide phase change underwater vehicle according to claim 3 is characterized in that: One axial end of the power unit in the first power unit group is threadedly matched with the first arc-shaped tube, and one axial end of the power unit in the second power unit group is threadedly matched with the second arc-shaped tube; The mounting plate is provided with a first mounting hole and a second mounting hole, the other axial end of the power unit in the first power unit group is plugged into the first mounting hole, and the other axial end of the power unit in the second power unit group is plugged into the second mounting hole.

5. The external supercritical carbon dioxide phase change underwater vehicle according to claim 4, characterized in that: The mounting plate is detachably mounted on the first shell or the second shell.

6. The external supercritical carbon dioxide phase change underwater vehicle according to claim 4, characterized in that: A first anti-rotation mechanism is provided between the other axial end of the power unit in the first power unit group and the corresponding mounting plate, and a second anti-rotation mechanism is provided between the other axial end of the power unit in the second power unit group and the corresponding mounting plate.

7. The external supercritical carbon dioxide phase change underwater vehicle according to claim 6, characterized in that: The first anti-rotation mechanism comprises a first groove and a first protrusion that cooperate with each other, one of the first groove and the first protrusion is arranged at the other axial end of the power unit in the first power unit group, and the other of the first groove and the first protrusion is arranged on the inner wall of the corresponding first mounting hole; The second anti-rotation mechanism includes a second groove and a second protrusion that cooperate with each other, one of the second groove and the second protrusion is arranged at the other axial end of the power unit in the second power unit group, and the other of the second groove and the second protrusion is arranged on the inner wall of the corresponding second mounting hole.

8. The external supercritical carbon dioxide phase change underwater vehicle according to claim 4, characterized in that: A first anti-rotation gasket is arranged between the other axial end of the power unit in the first power unit group and the corresponding first mounting hole, and a second anti-rotation gasket is arranged between the other axial end of the power unit in the second power unit group and the corresponding second mounting hole.

9. The external supercritical carbon dioxide phase change underwater vehicle according to claim 1, characterized in that: The drainage device further includes a second pressure equalizing unit, wherein the second pressure equalizing unit has a second pressure equalizing chamber, and the second pressure equalizing chamber is respectively connected to the first pressure equalizing chamber and the ballast water tank.

10. The external supercritical carbon dioxide phase change underwater vehicle according to claim 9, characterized in that: A partition is provided in the second pressure equalizing unit to separate the second pressure equalizing chamber into a first chamber and a second chamber, the first chamber is connected to the first pressure equalizing chamber, the second chamber is connected to the ballast water tank, and the partition has a plurality of through holes arranged at intervals, and the through holes connect the first chamber and the second chamber.

11. The external supercritical carbon dioxide phase change underwater vehicle according to claim 10, characterized in that: The diameter of the through hole is d, which satisfies: 3mm≤d≤5mm.

12. The external supercritical carbon dioxide phase change underwater vehicle according to claim 10, characterized in that: The volume of the first chamber is greater than the volume of the second chamber.

13. The external supercritical carbon dioxide phase change underwater vehicle according to claim 11, characterized in that: The partition is constructed as a cylindrical structure, and the partition includes a peripheral wall and a bottom wall. The bottom wall is arranged at one axial end of the peripheral wall, and the other axial end of the peripheral wall is arranged on the inner wall of the second pressure equalizing chamber. The plurality of through holes are arranged on the peripheral wall and penetrate the peripheral wall along the thickness direction of the peripheral wall.

14. The external supercritical carbon dioxide phase change underwater vehicle according to claim 13, characterized in that: The second pressure equalizing unit has a first inlet and a first outlet, the first inlet is connected to the first pressure equalizing unit, the first outlet is connected to the ballast water tank, and the first outlet is closer to the partition than the first inlet; Each of the through holes has a first opening located on the outer surface of the peripheral wall, and a ratio of a sum of areas of the plurality of first openings to a cross-sectional area of ​​the first outlet is c, satisfying: 1.5≤c≤3.

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