External supercritical carbon dioxide phase-change underwater vehicle

Abstract

The application 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 ballast water tank, along the front-rear direction of the main body part, the first shell is provided with a first end, and the second shell is at least partially spaced apart from the first end to form a containing space; the drainage device is arranged in the containing space, the drainage device comprises a power unit and a first pressure equalizing unit, the power unit is provided with a first storage chamber, the first storage chamber stores liquid carbon dioxide, the first pressure equalizing unit is provided with a first pressure equalizing chamber, the first storage chamber and the first pressure equalizing chamber are selectively communicated, and the first pressure equalizing chamber is selectively communicated with the ballast water tank; the first pressure equalizing unit is configured as an arc-shaped pipe matched with a first arc-shaped surface and a second arc-shaped surface, the power unit is multiple, and the multiple power units are sequentially arranged along the extension direction of the arc-shaped pipe.

Description

Technical Field

[0001] This application relates to the field of underwater vehicle technology, and in particular to an externally mounted supercritical carbon dioxide phase change underwater vehicle. Background Technology

[0002] Currently, when underwater vehicles experience unexpected situations such as rudder jamming, water ingress, or depth loss, it is necessary to quickly expel some of the stored seawater to provide positive buoyancy and enable the underwater vehicle to safely surface. At present, medium and large-sized underwater vehicles mainly use compressed air drainage systems or high-temperature gas drainage systems. However, as the operating depth of underwater vehicles gradually increases, compressed air drainage is significantly affected by back pressure, resulting in a significant decrease in drainage capacity; high-temperature gas drainage produces gases such as carbon monoxide and hydrogen, which pose a risk of secondary combustion and are also detrimental to safety. Summary of the Invention

[0003] This application provides an externally mounted supercritical carbon dioxide phase change underwater vehicle, which solves the technical problem of insufficient internal space in underwater vehicles and achieves the technical effect that the drainage device does not occupy the internal space of the underwater vehicle and can be flexibly set up.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include:

[0005] This application provides an externally mounted supercritical carbon dioxide phase change underwater vehicle, including a main body and a drainage device. The main body has a first shell and a second shell. The first shell is provided with a ballast water tank. Along the longitudinal direction of the main body, the first shell has a first end, and the second shell is disposed at the first end, at least partially spaced apart from the first end to form a receiving space. The drainage device is disposed within the receiving space and includes a power unit and a first pressure equalization unit. The power unit has a first storage chamber, which stores liquid carbon dioxide. The first pressure equalization unit has a first pressure equalization chamber, the first storage chamber is selectively connected to the first pressure equalization chamber, and the first pressure equalization chamber is selectively connected to the ballast water tank; wherein, along the front-rear direction, the sides of the second shell and the first end facing each other are respectively constructed as a first arc-shaped surface and a second arc-shaped surface, the protrusion direction of the first arc-shaped surface and the protrusion direction of the second arc-shaped surface are the same, the first pressure equalization unit is constructed as an arc-shaped tube adapted to the first arc-shaped surface and the second arc-shaped surface, and there are multiple power units, which are arranged sequentially along the extension direction of the arc-shaped tube.

[0006] The drainage device in the externally mounted supercritical carbon dioxide phase change underwater vehicle proposed in this application is located within the accommodating space, without occupying the internal space of the underwater vehicle. The drainage device includes a power unit and a first pressure equalization unit. The first pressure equalization unit is constructed as an arc-shaped pipe with a first arc-shaped surface and a second arc-shaped surface adapted together. Multiple power units are arranged sequentially along the extension direction of the arc-shaped pipe. A rated number of power units can be set according to the drainage needs of the ballast tanks, and the length of the arc-shaped pipe is determined based on the number of power units. The length and position of the arc-shaped pipe can be flexibly adjusted as needed. Furthermore, the drainage device is located outside the main body of the externally mounted supercritical carbon dioxide phase change underwater vehicle, facilitating maintenance, replacement, and inspection after later use.

[0007] Optionally, the arc-shaped pipe includes a first arc-shaped pipe and a second arc-shaped pipe, the first pressure equalization chamber includes a first sub-pressure equalization chamber and a second sub-pressure equalization chamber, the first arc-shaped pipe is provided with a first sub-pressure equalization chamber, the second arc-shaped pipe is provided with a second sub-pressure equalization chamber, and both the first arc-shaped pipe and the second arc-shaped pipe are adapted to the first arc-shaped surface and the second arc-shaped surface; the drainage device includes a first power unit group and a second power unit group, both of which include multiple power units, the multiple power units of the first power unit group are connected to the first arc-shaped pipe, and the multiple power units of the second power unit group are connected to the second arc-shaped pipe.

[0008] In the above scheme, the first arc-shaped pipe and the second arc-shaped pipe are arranged side by side, and both the first and second arc-shaped pipes are adapted to the first and second arc-shaped surfaces, making full use of space and reducing space waste. Multiple power units of the first power unit group are spaced apart along the extension direction of the first arc-shaped pipe, and multiple power units of the second power unit group are spaced apart along the extension direction of the second arc-shaped pipe, so that multiple power units are set to meet different drainage capacities.

[0009] Optionally, the drainage device further includes multiple mounting plates, wherein the number of power units in the first power unit group and the number of power units in the second power unit group are the same as the number of mounting plates; one axial end of the power unit in the first power unit group is fixed to the first arc-shaped pipe, 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-shaped pipe, and the other axial end is fixed to the corresponding mounting plate.

[0010] 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 connected to the first arc-shaped tube and the mounting plate respectively, and the two ends of the power unit in the second power unit group are connected to the second arc-shaped tube and the mounting plate respectively, so as to improve the stability and firmness of the power unit installation.

[0011] Optionally, one axial end of the power unit in the first power unit group is threaded into the first arc-shaped tube, and one axial end of the power unit in the second power unit group is threaded into 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 inserted into the first mounting hole, and the other axial end of the power unit in the second power unit group is inserted into the second mounting hole.

[0012] In the above scheme, during the installation and fixing of the power unit, one axial end of the power unit in the first power unit group is first threaded into the first arc-shaped 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 unit in the first power unit group can remain stable; one axial end of the power unit in the second power unit group is first threaded into the second arc-shaped 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 unit in the second power unit group can remain stable.

[0013] Optionally, the mounting plate can be detachably mounted to the first housing or the second housing.

[0014] In the above solution, the mounting plate is detachably installed on the first housing or the second housing, and the mounting plate is adapted to the first arc-shaped surface of the first housing or the second arc-shaped surface of the second housing, saving the space occupied by the drainage device.

[0015] 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.

[0016] 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, ensuring the stable installation of the power units and reducing the loosening of the threaded fit between the power units and the first arc-shaped pipe caused by the rotation of the power units in the first power unit group, thereby reducing carbon dioxide leakage from 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, ensuring the stable installation of the power units in the second power unit group, reducing the loosening of the threaded fit between the power units and the second arc-shaped pipe caused by the rotation of the power units in the second power unit group, thereby reducing carbon dioxide leakage from the power units in the second power unit group.

[0017] 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 being disposed 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 being disposed 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 being disposed 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 being disposed on the inner wall of the corresponding second mounting hole.

[0018] In the above scheme, the power unit in the first power unit group and the first mounting hole are engaged by a first groove and a first protrusion, reducing 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 more secure. Similarly, the power unit in the second power unit group and the second mounting hole are engaged by a second groove and a second protrusion, reducing 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 more secure.

[0019] Optionally, a first anti-rotation washer is provided 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 washer is provided between the other axial end of the power unit in the second power unit group and the corresponding second mounting hole.

[0020] In the above scheme, a first anti-rotation washer 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 more secure. A second anti-rotation washer 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 more secure.

[0021] Optionally, the drainage device further includes a second pressure equalization unit, which has a second pressure equalization chamber, and the second pressure equalization chamber is connected to the first pressure equalization chamber and the ballast water tank respectively.

[0022] In the above scheme, the second equalizing chamber is connected to the first equalizing chamber. The high-pressure supercritical carbon dioxide discharged from the power unit can be depressurized in the first equalizing chamber and then further depressurized in the second equalizing chamber, so that the carbon dioxide is fully buffered in the second equalizing chamber, thereby allowing the carbon dioxide to expand fully.

[0023] Optionally, the second pressure equalization unit is provided with a partition to divide the second pressure equalization chamber into a first chamber and a second chamber. The first chamber is connected to the first pressure equalization chamber, and the second chamber is connected to the ballast water tank. The partition has a plurality of spaced through holes that connect the first chamber and the second chamber.

[0024] In the above scheme, the carbon dioxide discharged by the power unit is depressurized for the first time in the first equalizing chamber and then enters the first chamber for a second depressurization and expansion. Then, the carbon dioxide in the first chamber passes through the through hole on the partition plate. The through hole on the partition plate decelerates and rectifies the carbon dioxide before it enters the second chamber and is discharged from the second chamber.

[0025] Optionally, the diameter of the through hole is d, which satisfies: 3mm≤d≤5mm.

[0026] In the above scheme, the through holes allow carbon dioxide to pass through quickly and can also play a certain role in blocking impurities or participating substances produced by incomplete combustion of the reagent.

[0027] Optionally, the volume of the first cavity is greater than the volume of the second cavity.

[0028] In the above scheme, since the volume of the first chamber is larger than that of the second chamber, after the carbon dioxide enters the first chamber, it undergoes sufficient decompression and expansion within the first chamber. The baffle slows down the carbon dioxide before it enters the second chamber, where it is buffered and pressure equalized again, limiting the rate at which the carbon dioxide is discharged, thus allowing the carbon dioxide to expand fully.

[0029] Optionally, the partition is constructed as a cylindrical structure, the partition includes a peripheral wall and a bottom wall, one axial end of the peripheral wall is provided with the bottom wall, the other axial end of the peripheral wall is provided with the inner wall of the second pressure equalization chamber, and a plurality of through holes are provided in the peripheral wall and penetrate the peripheral wall along the thickness direction of the peripheral wall.

[0030] In the above scheme, the partition is constructed as a cylindrical structure, and the through holes are set on the peripheral wall, which increases the communication area between the first cavity and the second cavity, so that the carbon dioxide in the first cavity can be discharged in time, reducing the excessive accumulation of carbon dioxide in the first cavity, and thus allowing the carbon dioxide to expand fully while being discharged in time for drainage.

[0031] Optionally, the second pressure equalization unit has a first inlet and a first outlet. The first inlet is connected to the first pressure equalization unit, and the first outlet is connected to the ballast water tank. The first outlet is closer to the baffle plate than the first inlet. Each through hole has a first opening located on the outer surface of the peripheral wall. 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.

[0032] In the above scheme, the sum of the areas of the first openings of all the through holes on the partition, that is, the sum of the cross-sectional areas of all the through holes, is greater than 1.5 to 3 times the cross-sectional area of ​​the first outlet of the second equalizing unit, so that carbon dioxide can pass through the through holes smoothly and impurities can be reduced from clogging the through holes. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a partial structural schematic diagram of the externally mounted supercritical carbon dioxide phase change underwater vehicle of this application.

[0035] Figure 2 This is a partial structural schematic diagram of the externally mounted supercritical carbon dioxide phase change underwater vehicle of this application.

[0036] Figure 3 This is a schematic diagram of the drainage device of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the second equalizing unit in this application;

[0038] Figure 5 This is a schematic diagram of the connection structure between the power unit and the mounting plate in one embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the connection structure between the power unit and the mounting plate in another embodiment of this application;

[0040] Figure 7 This is a partial structural schematic diagram of the externally mounted supercritical carbon dioxide phase change underwater vehicle in this application.

[0041] [Explanation of Labels in the Attached Image]

[0042] 1: Main body; 11: First shell; 111: First end; 12: Second shell; 10: Accommodation space; 13: Ballast water tank;

[0043] 2: Drainage device; 21: Power unit; 22: First pressure equalization unit; 221: First arc-shaped pipe; 222: Second arc-shaped pipe; 23: Second pressure equalization unit; 231: Partition plate; 2310: Through hole; 2311: Peripheral wall; 2312: Bottom wall; 232: First cavity; 233: Second cavity; 234: First inlet; 235: First outlet;

[0044] 3: Mounting plate; 31: First mounting hole; 32: Second mounting hole;

[0045] 4: Flow guiding components;

[0046] 51: First protrusion; 52: Second protrusion;

[0047] 61: First anti-rotation gasket; 62: Second anti-rotation gasket.

[0048] 7: Carbon dioxide recovery device; 71: Gas-liquid separation component; 72: Gas capture component; 73: Recovery chamber; 74: Cooling component; 75: Compression component. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0051] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0055] Currently, when underwater vehicles encounter unexpected situations such as rudder jamming, water ingress, or depth loss, 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 safely surface.

[0056] Currently, medium and large underwater vehicles mainly employ either compressed air drainage systems or high-temperature gas drainage systems. Compressed air drainage systems pre-compress and store air in high-pressure air cylinders. When needed, the valve on the pipeline connecting the air cylinder and the water tank is opened to introduce high-pressure air into the water tank, thereby draining the internal seawater. High-temperature gas drainage systems seal solid agents in a gas generator. When needed, an electrical signal ignites the agent, causing a chemical reaction that generates high-temperature gas, which is then injected into the water tank to drain the internal seawater.

[0057] As the operating depth of underwater vehicles gradually increases, compressed air drainage is greatly affected by back pressure, resulting in a significant decrease in drainage capacity; the carbon monoxide, hydrogen, and other gases produced by high-temperature gas drainage pose a risk of secondary combustion, which is detrimental to safety.

[0058] Therefore, underwater vehicles require a safe, efficient, and powerful drainage device to provide new assurance for their navigation safety. However, the large space occupied by the drainage device leads to insufficient space inside the vehicle. Therefore, an external supercritical carbon dioxide phase change underwater vehicle is needed, in which the drainage device does not occupy the internal space of the external supercritical carbon dioxide phase change underwater vehicle.

[0059] This application provides an externally mounted supercritical carbon dioxide phase change underwater vehicle, referenced... Figures 1 to 3 The externally mounted supercritical carbon dioxide phase change underwater vehicle includes a main body 1 and a drainage device 2. The main body 1 has a first shell 11 and a second shell 12. The first shell 11 is provided with a ballast water tank 13. Along the front-rear direction of the main body 1, the first shell 11 has a first end 111. The second shell 12 is located at the first end 111 and is at least partially spaced from the first end 111 to form a receiving space 10. The drainage device 2 is located in the receiving space 10. The drainage device 2 includes a power unit 21 and a first pressure equalization unit 22. The power unit 21 has a first storage chamber. The chamber stores liquid carbon dioxide. The first pressure equalization unit 22 has a first pressure equalization chamber. The first storage chamber and the first pressure equalization chamber are selectively connected. The first pressure equalization chamber is selectively connected to the ballast water tank 13. In the front-rear direction, the sides of the second shell 12 and the first end 111 facing each other are respectively constructed as a first arc-shaped surface and a second arc-shaped surface. The protrusion direction of the first arc-shaped surface is the same as that of the second arc-shaped surface. The first pressure equalization unit 22 is constructed as an arc-shaped tube adapted to the first arc-shaped surface and the second arc-shaped surface. There are multiple power units 21, and the multiple power units 21 are arranged sequentially along the extension direction of the arc-shaped tube.

[0060] Along the front-rear direction of the main body 1, the second housing 12 is at least partially spaced from the first end 111. This spacer can be located at the middle portion of the second housing 12 and the two ends of the first end 111, forming a receiving space 10 between the second housing 12 and the first end 111. Alternatively, the second housing 12 can be connected to the middle portion of the first end 111, while the two ends of the second housing 12 are spaced apart. The specific connection position between the second housing 12 and the first end 111 depends on the specific circumstances.

[0061] The first storage chamber contains liquid carbon dioxide. Carbon dioxide is liquid under certain pressure and temperature, has a high density, and is easy to store. Liquid carbon dioxide can be rapidly converted to a supercritical state by increasing temperature and pressure, expanding its volume several times. It has a strong instantaneous work capacity and is non-toxic and pollution-free, making it a novel drainage technology. After the liquid carbon dioxide in the first storage chamber is converted to supercritical carbon dioxide, its volume expands dramatically. The expansion and work done by converting the liquid carbon dioxide into high-pressure supercritical carbon dioxide allows for drainage, resulting in strong drainage capacity and high safety and reliability.

[0062] The first storage chamber of the power unit 21 is optionally connected to the first equalization chamber, which can depressurize the carbon dioxide discharged from the first storage chamber. The carbon dioxide discharged from the first storage chamber is at a very high pressure, and the high-pressure gas enters the first equalization chamber, where the volume of the high-pressure carbon dioxide can further expand. After depressurization, the carbon dioxide can be discharged from the first equalization chamber to the ballast water tank 13 for drainage.

[0063] The main body 1 of the externally mounted supercritical carbon dioxide phase change underwater vehicle proposed in this application embodiment has a first shell 11 and a second shell 12. The first shell 11 is provided with a ballast water tank 13 inside, and the second shell 12 is located outside the first end 111 of the first shell 11. An accommodating 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 accommodating space 10 and does not occupy the internal space of the externally mounted supercritical carbon dioxide phase change underwater vehicle.

[0064] The drainage device 2 includes a power unit 21 and a first pressure equalization unit 22. The first pressure equalization unit 22 is constructed as an arc-shaped pipe with a first arc-shaped surface and a second arc-shaped surface adapted together. Multiple power units 21 are arranged sequentially along the extension direction of the arc-shaped pipe. The 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 pipe is determined according to the number of power units 21. The length and position of the arc-shaped pipe can be flexibly adjusted as needed. Furthermore, the drainage device 2 is located on the exterior of the main body 1 of the externally mounted supercritical carbon dioxide phase change underwater vehicle, facilitating maintenance, replacement, and inspection after later use.

[0065] The arc-shaped tube is connected to multiple power units 21 to form a whole. The arc-shaped tube provides an installation interface for the power unit 21. Along the direction from the first housing 11 to the second housing 12, the arc-shaped tube can be arranged in one or more sets in parallel to adapt to different spaces. At the same time, the first pressure equalization chamber in the arc-shaped tube reduces the pressure of the high-pressure supercritical carbon dioxide discharged by the power unit 21.

[0066] In one 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 shell. The first end 111 of the first shell 11 can be the head or tail of the underwater drainer. The first end 111 of the first shell 11 and the second shell 12 are spaced apart and form a receiving space 10. The draining device 2 is set in the receiving space 10, making full use of the space of the external supercritical carbon dioxide phase change underwater vehicle and reducing space waste.

[0067] In one specific embodiment, each power unit 21 is equipped with an activating agent. The activating agent can communicate with an external control unit. After receiving the activation signal from the control unit, the activating agent undergoes a chemical reaction, thereby generating heat, causing the liquid carbon dioxide to absorb heat and undergo a phase change to transform into high-pressure supercritical carbon dioxide.

[0068] Each power unit 21 is equipped with a pressure relief unit at its connection to the arc-shaped pipe. The pressure relief unit is designed to rupture when the pressure in the first storage chamber exceeds a preset value, thereby connecting the first storage chamber and the first equalizing chamber. The pressure relief unit can be a one-way valve with a defined pressure threshold. When the pressure in the storage chamber is sufficiently high and exceeds the aforementioned pressure threshold, the pressure relief unit opens, thus connecting the first storage chamber and the first equalizing chamber. Consequently, high-pressure gaseous carbon dioxide can enter the first equalizing chamber for decompression and then be discharged to the ballast water tank 13 for drainage.

[0069] Optionally, refer to Figure 1 and Figure 3 The arc-shaped pipe includes a first arc-shaped pipe 221 and a second arc-shaped pipe 222. The first pressure equalization chamber includes a first sub-pressure equalization chamber and a second sub-pressure equalization chamber. The first arc-shaped pipe 221 is provided with the first sub-pressure equalization chamber, and the second arc-shaped pipe 222 is provided with the second sub-pressure equalization chamber. Both the first arc-shaped pipe 221 and the second arc-shaped pipe 222 are adapted to the first arc-shaped surface and the second arc-shaped surface. The drainage device 2 includes a first power unit group and a second power unit group. Both the first power unit group and the second power unit group include multiple power units 21. The multiple power units 21 of the first power unit group are connected to the first arc-shaped pipe 221, and the multiple power units 21 of the second power unit group are connected to the second arc-shaped pipe 222.

[0070] The first arc-shaped pipe 221 and the second arc-shaped pipe 222 are arranged side by side, and both the first arc-shaped pipe 221 and the second arc-shaped pipe 222 are adapted to the first arc-shaped surface and the second arc-shaped surface, making full use of space and reducing space waste. Multiple power units 21 of the first power unit group are arranged at intervals along the extension direction of the first arc-shaped pipe 221, and multiple power units 21 of the second power unit group are arranged at intervals along the extension direction of the second arc-shaped pipe 222, so that multiple power units 21 are set to meet different drainage capacities.

[0071] In practical applications, the number of the first power unit group and the second power unit group, as well as 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.

[0072] The first arc-shaped pipe 221 and the second arc-shaped pipe 222 can be connected by a Y-shaped pipe and then connected to the ballast water tank 13.

[0073] Optionally, refer to Figure 1 The drainage device 2 also includes multiple mounting plates 3. 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-shaped pipe 221, and the other axial end is fixed to the corresponding mounting plate 3. One axial end of the power unit 21 in the second power unit group is fixed to the second arc-shaped pipe 222, and the other axial end is fixed to the corresponding mounting plate 3.

[0074] Mounting plate 3 is used to fix the power unit 21. The two ends of the power unit 21 in the first power unit group are connected to the first arc-shaped tube 221 and the mounting plate 3, respectively. The two ends of the power unit 21 in the second power unit group are connected to the second arc-shaped tube 222 and the mounting plate 3, respectively, to improve the stability and firmness of the power unit 21 installation. The mounting plate 3 is designed to fit the first and second arc-shaped surfaces to accommodate different positions within the accommodating space 10.

[0075] Optionally, one axial end of the power unit 21 in the first power unit group is threaded into the first arc-shaped tube 221, and one axial end of the power unit 21 in the second power unit group is threaded into the second arc-shaped tube 222; the mounting plate 3 is provided with a first mounting hole 31 and a second mounting hole 32, 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.

[0076] During the installation and fixing of the power unit 21, one axial end of the power unit 21 in the first power unit group is first threaded into the first arc-shaped 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 threaded into the second arc-shaped 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.

[0077] Optionally, the mounting plate 3 is detachably mounted on the first housing 11 or the second housing 12. The mounting plate 3 is detachably mounted on the first housing 11 or the second housing 12, and the mounting plate 3 is adapted to the first arcuate surface of the first housing 11 or the second arcuate surface of the second housing 12, saving the space occupied by the drainage device 2.

[0078] 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.

[0079] The first anti-rotation mechanism reduces the rotation of power unit 21 in the first power unit group, ensuring its secure installation and reducing the risk of loosening of the threaded connection between power unit 21 and the first arc-shaped tube 221 due to rotation, thereby reducing carbon dioxide leakage from power unit 21. The second anti-rotation mechanism reduces the rotation of power unit 21 in the second power unit group, ensuring its secure installation and reducing the risk of loosening of the threaded connection between power unit 21 and the second arc-shaped tube 222 due to rotation, thereby reducing carbon dioxide leakage from power unit 21.

[0080] 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 disposed 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 disposed 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 disposed 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 disposed on the inner wall of the corresponding second mounting hole 32.

[0081] The power unit 21 in the first power unit group and the first mounting hole 31 are connected by a first groove and a first protrusion 51, which reduces the relative rotation between the power unit 21 and the first mounting hole 31, thereby making the installation of the power unit 21 in the first power unit group more secure. The first groove can be provided on the power unit 21 in the first power unit group, and the first protrusion 51 can be 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 can be provided on the inner wall of the first mounting hole 31.

[0082] The power unit 21 in the second power unit group and the second mounting hole 32 are engaged by a second groove and a second protrusion 52, which reduces the relative rotation between the power unit 21 and the second mounting hole 32, thereby making the installation of the power unit 21 in the second power unit group more stable. The second groove can be provided on the power unit 21 in the second power unit group, and the second protrusion 52 can be 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 can be provided on the inner wall of the second mounting hole 32.

[0083] Optionally, refer to Figure 6 A first anti-rotation washer 61 is provided 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 washer 62 is provided between the other axial end of the power unit 21 in the second power unit group and the corresponding second mounting hole 32.

[0084] A first anti-rotation washer 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 and the first mounting hole 31, thereby ensuring the stable installation of the power unit 21 in the first power unit group. A second anti-rotation washer 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 and the second mounting hole 32 in the second power unit group, thereby ensuring the stable installation of the power unit 21 in the second power unit group.

[0085] In one specific embodiment, the first mounting hole 31 and the second mounting hole 32 can be circular or hexagonal. The cross-section of the outer peripheral surface of the power unit 21 at least where it connects to the first mounting hole 31 and the second mounting hole 32 is circular or 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 hexagonal to reduce 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 hexagonal, the first mounting hole 31 and the second mounting hole 32 can also be hexagonal to reduce relative rotation between the power unit 21 and the first mounting hole 31 or the second mounting hole 32.

[0086] Optionally, refer to Figure 1 and Figure 3 The drainage device 2 also includes a second pressure equalization unit 23, which has a second pressure equalization chamber, and the second pressure equalization chamber is connected to the first pressure equalization chamber and the ballast water tank 13 respectively.

[0087] After the carbon dioxide in the first storage chamber undergoes a first decompression in the first equalization chamber, it enters the second equalization chamber. At this time, the volume of the carbon dioxide with higher pressure can undergo a second decompression and expansion in the second equalization chamber. The decompressed carbon dioxide can then be discharged from the second decompression chamber to the ballast water tank 13.

[0088] In other words, the second equalizing chamber is connected to the first equalizing chamber. The high-pressure carbon dioxide discharged from the power unit 21 can be depressurized in the first equalizing chamber and then further depressurized in the second equalizing chamber, so that the carbon dioxide is fully buffered in the second equalizing chamber and thus expands fully.

[0089] Optionally, refer to Figure 4 The second equalization unit 23 is provided with a partition 231 to divide the second equalization chamber into a first chamber 232 and a second chamber 233. The first chamber 232 is connected to the first equalization chamber, and the second chamber 233 is connected to the ballast water tank 13. The partition 231 has a plurality of spaced through holes 2310, which connect the first chamber 232 and the second chamber 233.

[0090] A partition 231 is installed in the second equalizing chamber, and multiple through holes 2310 are spaced apart on the partition 231, dividing the second 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 a first decompression in the first equalizing chamber, and then undergoes a second decompression and expansion. The carbon dioxide in the first chamber 232 then passes through the through holes 2310 on the partition 231, which decelerate and rectify the carbon dioxide before it enters the second chamber 233, and is then discharged from the second chamber 233.

[0091] Optionally, the diameter of the through hole 2310 is d, satisfying: 3mm≤d≤5mm. This allows carbon dioxide to pass through quickly and also provides some barrier against impurities or substances produced by incomplete combustion of the reagent.

[0092] The through-hole 2310 allows for secondary diffusion of high-pressure carbon dioxide, resulting in a better and more uniform mixing of the medium. 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 set on the partition plate 231 of the same area will be reduced, which is not conducive to the uniform diffusion of carbon dioxide medium.

[0093] 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.

[0094] Optionally, the volume of the first cavity 232 is greater than the volume of the second cavity 233.

[0095] The carbon dioxide discharged from the power unit 21 undergoes a first depressurization in the first equalizing chamber before entering the first chamber 232 for a second depressurization. Then, the carbon dioxide in the first chamber 232 passes through a through-hole 2310 on the partition 231, where it is decelerated and rectified before entering the second chamber 233. Since the volume of the first chamber 232 is larger than that of the second chamber 233, the carbon dioxide undergoes phased depressurization and expansion within the first chamber 232. The partition 231 then decelerates the carbon dioxide before it enters the second chamber 233, where it is buffered and equalized again, limiting the emission rate and allowing the carbon dioxide to expand fully.

[0096] Optionally, refer to Figure 4 The partition 231 is constructed as a cylindrical structure, including a peripheral wall 2311 and a bottom wall 2312. The bottom wall 2312 is provided at one axial end of the peripheral wall 2311, and the other axial end of the peripheral wall 2311 is provided on the inner wall of the second pressure equalization chamber. Multiple through holes 2310 are provided in the peripheral wall 2311 and penetrate the peripheral wall 2311 along the thickness direction of the peripheral wall 2311.

[0097] The partition 231 is a cylindrical structure disposed within the second pressure equalization chamber. One end of the peripheral wall 2311 of this cylindrical structure has a bottom wall 2312, and the peripheral wall 2311 is connected to the inner wall of the second pressure equalization chamber. A through hole 2310 is disposed on and penetrates the peripheral wall 2311. When carbon dioxide enters the second chamber 233 from the first chamber 232 through the through hole 2310, the through hole 2310 on the peripheral wall 2311 slows down and reduces the pressure on the carbon dioxide. The cylindrical structure of the partition 231 and the through hole 2310 on the peripheral wall 2311 increase the communication area between the first chamber 232 and the second chamber 233, allowing carbon dioxide in the first chamber 232 to be discharged promptly, reducing excessive accumulation of carbon dioxide in the first chamber 232. This allows the carbon dioxide to expand fully while being discharged promptly for drainage.

[0098] In one specific embodiment, the partition 231 has multiple through holes 2310 on its peripheral wall 2311 and bottom wall 2312.

[0099] Optionally, refer to Figure 4The second equalizing unit 23 has a first inlet 234 and a first outlet 235. The first inlet 234 is connected to the first 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 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, which satisfies: 1.5≤c≤3.

[0100] The second pressure equalization unit 23 has a first inlet 234 and a first outlet 235. The first inlet 234 is connected to the first pressure equalization chamber, and the first outlet 235 is connected to the ballast water tank 13. The first inlet 234 is also connected to the first chamber 232, and the first outlet 235 is connected to the second chamber 233. The inner diameter of the first inlet 234 is larger than the inner diameter of the first outlet 235, so that carbon dioxide entering the second pressure equalization chamber through the first inlet 234 can be released more smoothly from the first outlet 235.

[0101] The sum of the areas of the first openings of all the through holes 2310 on the partition 231, that is, the sum of the cross-sectional areas of all the through holes 2310, is greater than 1.5 to 3 times the cross-sectional area of ​​the first outlet 235 of the second pressure equalization unit 23. This allows carbon dioxide gas to pass smoothly through the through holes 2310 and reduces the blockage of the through holes 2310 by impurities. The impurities mainly come from the impurities or substances produced by the incomplete combustion of the igniting agent.

[0102] The ratio c of the sum of the areas of the multiple first openings to the area of ​​the cross-section of the first outlet 235 can 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.

[0103] In one specific embodiment, a through-hole dynamic adjustment part is provided on the partition 231, and the dynamic adjustment part corresponds one-to-one with 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 pressure reduction. At the same time, by optimizing the diameter of the through-hole 2310, the energy loss of fluid when passing through the partition 231 is reduced, and the pressure reduction efficiency is improved.

[0104] The through-hole dynamic adjustment unit can be a mechanical adjustment device, such as an adjustment ring driven by a micro-motor on the partition 231. The adjustment ring changes the diameter of the through-hole 2310 through mechanical movement. When the pressure sensors on both sides of the partition 231 detect an increase in the pressure difference, the control unit drives the motor to move the adjustment ring outward, increasing the diameter of the through-hole 2310 and reducing the pressure difference. When the pressure difference is too small, the drive motor moves the adjustment ring inward, decreasing the diameter of the through-hole 2310 and maintaining the system pressure.

[0105] The through-hole dynamic adjustment section can also be a shape memory alloy. When the pressure sensors on both sides of the partition 231 detect an increase in the pressure difference between the two sides of the partition 231, the control unit heats the alloy sheet to expand it, increasing the diameter of the through-hole 2310 and reducing flow resistance. When the pressure difference decreases, heating stops, the alloy sheet cools and contracts, and the diameter of the through-hole 2310 decreases, maintaining system stability.

[0106] The through-hole dynamic adjustment unit can also be a piezoelectric ceramic regulator, with a piezoelectric ceramic plate embedded at the edge of each through-hole 2310 in the partition 231. The ceramic plate is connected to a power source. When the flow sensor detects that the flow rate through the through-hole 2310 is too high, the control unit applies voltage to expand the ceramic plate, reducing the diameter of the through-hole 2310 and limiting the flow rate. When the flow rate is too low, the voltage is reduced to contract the ceramic plate, increasing the diameter of the through-hole 2310 and increasing the flow rate.

[0107] In another specific embodiment, a self-cleaning structure, such as an ultrasonic cleaner, a microbrush, or a scraper, is provided around the through hole 2310 of the partition 231.

[0108] Specifically, multiple ultrasonic transducers are installed on the surface of the partition 231, and the ultrasonic transducers are connected to an ultrasonic generator. When the pressure sensors on both sides of the partition 231 detect an increase in the pressure difference between the two sides of the partition 231, the control unit starts the ultrasonic generator. The ultrasonic generator generates an ultrasonic signal and transmits the ultrasonic signal to the ultrasonic transducer. The ultrasonic transducer converts the ultrasonic signal into mechanical vibration energy, thereby removing impurities around the through hole 2310.

[0109] Alternatively, an annular microbrush or scraper can be provided around each through-hole 2310 of the partition 231, with the microbrush driven by a motor. When the flow sensors on both sides of the partition 231 detect a decrease in the flow through the through-hole 2310, the control unit starts the motor, and the microbrush or scraper rotates to remove the deposits.

[0110] By setting a self-cleaning structure to clean the partition 231, the blockage of the through hole 2310 by impurities is reduced, thereby improving the decompression efficiency.

[0111] In one specific embodiment, the second pressure equalization unit 23 is connected to an arc-shaped pipe, and the cross-sectional areas of both the first arc-shaped pipe 221 and the second arc-shaped pipe 222 are smaller than the cross-sectional area of ​​the second pressure equalization unit 23. After carbon dioxide enters the second pressure equalization unit 23, a local pressure drop occurs due to the sudden increase in the local cross-sectional area. The cross-sectional area of ​​the first outlet 235 of the second pressure equalization unit 23 is less than half the cross-sectional area of ​​the first inlet 234, resulting in a more stable carbon dioxide emission rate.

[0112] In one specific embodiment, the cross-sectional area of ​​the first inlet 234 of the second equalizing unit 23 is smaller than the cross-sectional area of ​​the outlet of the power unit 21 in order to control the flow rate of carbon dioxide.

[0113] In one specific embodiment, the drainage device 2 further includes a flow guiding component 4, which is connected to the second equalizing chamber via a third arc-shaped pipe. The flow guiding component 4 is arranged on top of the ballast water tank 13. The flow guiding component 4 can prevent seawater from entering its interior. The interior of the flow guiding component 4 has multiple layers of annular holes, which can rectify and slow down the flow of carbon dioxide, allowing carbon dioxide to be discharged into the ballast water tank 13 at a relatively gentle pressure.

[0114] The third arc-shaped tube can be connected to the flow guiding component 4 and the second pressure equalization unit 23. The shape inside the third arc-shaped tube can be adjusted according to specific needs to adapt to different spaces.

[0115] In one alternative embodiment, reference Figure 7 The drainage device 2 also includes a carbon dioxide recovery device 7, which comprises a gas-liquid separation assembly 71, a gas capture assembly 72, a recovery chamber 73, a cooling assembly 74, a compression assembly 75, and a storage assembly. The gas-liquid separation assembly 71 is located between the ballast water tank 13 and the drain outlet. The gas capture assembly 72 communicates with the chamber of the gas-liquid separation assembly 71. The recovery chamber 73 communicates with the gas capture assembly 72. The cooling assembly 74 is located inside the recovery chamber 73. The compression assembly 75 is located at the outlet of the recovery chamber 73. The storage assembly can be a high-pressure storage tank for collecting and storing carbon dioxide.

[0116] Specifically, a gas-liquid separation assembly 71 is installed between the ballast water tank 13 and the drain outlet. The gas-liquid separation assembly 71 is connected to a gas capture assembly 72. The gas capture assembly 72 prevents gas from escaping through physical isolation (such as an elastic airbag) and collects the gas in the elastic airbag. During drainage, the gas-liquid mixture enters the chamber of the gas-liquid separation assembly 71. The liquid sinks due to gravity and is discharged from the bottom, while the gas is collected by the gas capture assembly 72.

[0117] The gas collected by the gas capture component 72 enters the recovery chamber 73. The cooling component 74, which can be a cooling coil or a cooling fan, is located in the recovery chamber 73 to cool the high-temperature carbon dioxide. The compression component 75, which can be a compression pump or a compressor, compresses the gas drained from the recovery chamber 73, thereby collecting the compressed carbon dioxide in the storage component.

[0118] 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 installed between the compression component 75 and the power unit 21. When the carbon dioxide in a certain power unit 21 is emptied, the control unit controls the valve to open, thereby collecting the carbon dioxide recovered in the carbon dioxide recovery device 7 into the power unit 21, thus realizing the reuse of carbon dioxide, reducing operating costs, and reducing carbon dioxide emissions, thereby reducing the impact of carbon dioxide on the marine ecosystem.

[0119] In another optional embodiment, considering energy recovery and utilization, a heat recovery component is provided inside the flow guiding assembly 4. The heat recovery component includes a shell-and-tube, plate, or finned heat exchanger, which is made of corrosion-resistant and high-pressure-resistant materials. The heat recovery component also includes a heat storage section and a heat conversion section. The heat transfer medium in the heat exchanger absorbs waste heat, increases in temperature, and transfers the heat to the heat storage section. The heat storage section stores the recovered heat energy through a phase change material heat storage tank or a hot water storage tank. The heat conversion section can be a thermoelectric generator or a steam turbine to convert the heat energy into electrical energy, thereby increasing the endurance of the external supercritical carbon dioxide phase change underwater vehicle.

[0120] The drainage device 2 in this application is disposed within the receiving cavity between the first housing 11 and the second housing 12, and does not occupy the internal space of the externally mounted supercritical carbon dioxide phase change underwater vehicle. The first pressure equalization unit 22 of the drainage device 2 is constructed as an arc-shaped tube adapted to the shape of the first housing 11 and the second housing 12, with one or more arc-shaped tubes stacked to accommodate different spaces. Simultaneously, since the volume of the first pressure equalization chamber in the arc-shaped tube is larger than the volume of the first storage chamber in the power unit 21, for example, the volume of the first pressure equalization chamber is 5-10 times the volume of the first storage chamber. The first pressure equalization chamber performs the first decompression of the carbon dioxide.

[0121] When there are multiple arc-shaped tubes, they can be connected first using Y-shaped tubes or other irregularly shaped tubes, and then connected to the second pressure equalization chamber. The second pressure equalization unit 23 has a first inlet 234 and a first outlet 235. The first inlet 234 is connected to the first pressure equalization chamber and is correspondingly connected to the first cavity 232. The first outlet 235 is connected to the flow guiding component 4 and is correspondingly connected to the second cavity 233.

[0122] The second equalizing chamber is connected to the first equalizing chamber. High-pressure carbon dioxide discharged from the power unit 21 can be depressurized upon entering the first equalizing chamber before entering the first chamber 232 through the first inlet 234. The carbon dioxide is then depressurized again in the first chamber 232. Next, the carbon dioxide is decelerated and enters the second chamber 233 through the through-hole 2310 on the partition 231. Because 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 equalizing chamber can be discharged more smoothly from the second chamber 233, which is beneficial to the overall stability of the device's operation.

[0123] The carbon dioxide discharged from the second equalizing chamber is discharged through the first outlet 235 and the third arc-shaped pipe to the flow guiding component 4. After being decelerated and rectified by the flow guiding component 4, it is sprayed out to the ballast water tank 13, thereby realizing drainage.

[0124] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0125] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0126] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0127] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An externally mounted supercritical carbon dioxide phase change underwater vehicle, characterized in that, include: The main body has a first shell and a second shell. The first shell is provided with a ballast water tank. Along the front-rear direction of the main body, the first shell has a first end. The second shell is disposed at the first end and is at least partially spaced apart from the first end to form an accommodating space. A drainage device is provided within the containment space. The drainage device includes a power unit and a first pressure equalization unit. The power unit has a first storage chamber containing liquid carbon dioxide. The first pressure equalization unit has a first pressure equalization chamber. The first storage chamber is selectively connected to the first pressure equalization chamber, and the first pressure equalization chamber is selectively connected to the ballast water tank. Along the front-back direction, the sides of the second housing and the first end facing each other are respectively constructed as a first arc-shaped surface and a second arc-shaped surface. The protrusion direction of the first arc-shaped surface and the protrusion direction of the second arc-shaped surface are the same. The first pressure equalization unit is constructed as an arc-shaped tube adapted to the first arc-shaped surface and the second arc-shaped surface. There are multiple power units, and the multiple power units are arranged sequentially along the extension direction of the arc-shaped tube. The drainage device further includes a second pressure equalization unit, which has a second pressure equalization chamber. The second pressure equalization chamber is connected to the first pressure equalization chamber and the ballast water tank, respectively. A partition is provided inside the second pressure equalization unit to divide the second pressure equalization chamber into a first chamber and a second chamber. The first chamber is connected to the first pressure equalization chamber, and the second chamber is connected to the ballast water tank. The partition has a plurality of spaced through holes that connect the first chamber and the second chamber.

2. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 1, characterized in that, The arc-shaped tube includes a first arc-shaped tube and a second arc-shaped tube. The first pressure equalization chamber includes a first sub-pressure equalization chamber and a second sub-pressure equalization chamber. The first arc-shaped tube is provided with a first sub-pressure equalization chamber, and the second arc-shaped tube is provided with a second sub-pressure equalization chamber. The first arc-shaped tube and the second arc-shaped tube are both adapted to the first arc-shaped surface and the second arc-shaped surface. The drainage device includes a first power unit group and a second power unit group. Both the first power unit group and the second power unit group include multiple power units. The multiple power units of the first power unit group are connected to the first arc-shaped pipe, and the multiple power units of the second power unit group are connected to the second arc-shaped pipe.

3. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 2, characterized in that, The drainage device also includes multiple mounting plates, and the number of power units in the first power unit group and the number of power units in the second power unit group are the same as the number of mounting plates; In the first power unit group, one axial end of the power unit is fixed to the first arc-shaped tube, and the other axial end is fixed to the corresponding mounting plate. In the second power unit group, one axial end of the power unit is fixed to the second arc-shaped tube, and the other axial end is fixed to the corresponding mounting plate.

4. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 3, characterized in that, One axial end of the power unit in the first power unit group is threaded into the first arc-shaped tube, and one axial end of the power unit in the second power unit group is threaded into 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 inserted into the first mounting hole, and the other axial end of the power unit in the second power unit group is inserted into the second mounting hole.

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

6. The externally mounted 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 externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 6, characterized in that, 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 disposed 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 disposed 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 disposed 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 disposed on the inner wall of the corresponding second mounting hole.

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

9. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 1, characterized in that, The diameter of the through hole is d, which satisfies: 3mm≤d≤5mm.

10. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 1, characterized in that, The volume of the first cavity is greater than the volume of the second cavity.

11. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 9, characterized in that, The partition is constructed as a cylindrical structure, comprising a peripheral wall and a bottom wall. The bottom wall is located at one axial end of the peripheral wall, and the other axial end of the peripheral wall is located on the inner wall of the second pressure equalization chamber. A plurality of through holes are provided on the peripheral wall and penetrate the peripheral wall along the thickness direction of the peripheral wall.

12. The externally mounted supercritical carbon dioxide phase change underwater vehicle according to claim 11, characterized in that, The second pressure equalization unit has a first inlet and a first outlet. The first inlet is connected to the first pressure equalization unit, and the first outlet is connected to the ballast water tank. 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 the ratio of the sum of the areas of the plurality of first openings to the area of ​​the cross-section of the first outlet is c, satisfying: 1.5≤c≤3.

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