Built-in compressed air and carbon dioxide linkage drainage system and aircraft

Abstract

The invention relates to the technical field of aircrafts, in particular to a built-in compressed air and carbon dioxide linkage drainage system and an aircraft. The drainage system comprises a drainage device, a water ballast tank, a first connecting pipeline and a control unit, a first storage cavity for storing liquid carbon dioxide is formed in the first power unit, a second storage cavity for storing high-pressure air is formed in the second power unit, and a pressure reduction cavity is formed in the pressure reduction unit; the first storage chamber and the second storage chamber are both selectively communicated with the pressure reduction chamber; the water ballast tank is provided with a third storage chamber selectively communicated with the pressure reduction chamber; the first connecting pipeline is connected with the second power unit and the pressure reduction unit, and a first on-off valve is arranged on the first connecting pipeline; the first power unit is suitable for converting liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit, and the high-pressure supercritical carbon dioxide enters the third storage chamber after being decompressed by the decompression chamber, so that the first connecting pipeline selectively communicates with the second storage chamber and the decompression chamber.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and in particular to an internal compressed air and carbon dioxide linked drainage system and a vehicle. Background Art

[0002] At present, when underwater vehicles encounter accidents such as rudder jamming, water ingress, and depth drop, it is necessary to quickly drain a part of the stored seawater in a short time to provide positive buoyancy and realize the safe floating of the underwater vehicle. Currently, the main drainage system used in medium and large underwater vehicles is the high-temperature gas drainage system. The high-temperature gas drainage system seals solid agents in a gas generator. When needed, the agents are ignited by an electrical signal to cause a chemical reaction to form high-temperature gas, which is injected into the water tank to drain the seawater inside the underwater vehicle. As the working depth of the underwater vehicle gradually increases, the compressed air drainage is greatly affected by the back pressure, and the drainage capacity decreases significantly; the gases such as carbon monoxide and hydrogen generated by the high-temperature gas drainage have potential secondary combustion hazards and are not conducive to safety. Summary of the Invention

[0003] This application provides an internal compressed air and carbon dioxide linked drainage system and a vehicle, and the drainage capacity of the drainage system is adjustable, safe and efficient.

[0004] To achieve the above object, the main technical solutions adopted in this application include: In a first aspect, an embodiment of this application provides an internal compressed air and carbon dioxide linked drainage system, including a drainage device, a ballast water tank, a first connection pipeline and a control unit. The drainage device includes a first power unit, a second power unit and a pressure reduction unit. A first storage chamber for storing liquid carbon dioxide is arranged in the first power unit, a second storage chamber for storing high-pressure air is arranged in the second power unit, a pressure reduction chamber is arranged in the pressure reduction unit, and the first storage chamber and the second storage chamber can be selectively communicated with the pressure reduction chamber; the ballast water tank has a third storage chamber for accommodating water, and the third storage chamber can be selectively communicated with the pressure reduction chamber; the first connection pipeline is respectively connected to the second power unit and the pressure reduction unit, and a first on-off valve is arranged on the first connection pipeline; the control unit is communicatively connected to the first power unit, and the first power unit is adapted to convert liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit and enter the third storage chamber after being decompressed by the pressure reduction chamber. The control unit is communicatively connected to the first on-off valve to selectively connect the second storage chamber and the pressure reduction chamber through the first connection pipeline.

[0005] In the drainage system proposed in the embodiment of the present application, high-pressure air is stored in the second storage chamber of the second power unit. When the ballast tank needs to drain water, the control unit controls the first on-off valve to connect the second storage chamber and the decompression chamber. The high-pressure air in the second storage chamber is discharged to the decompression chamber through the first connection pipeline. The high-pressure air expands in the decompression chamber and then is discharged from the decompression chamber to the ballast tank for drainage.

[0006] After the liquid carbon dioxide in the first storage chamber is transformed into supercritical carbon dioxide, its volume expands greatly. By using the heat absorption of liquid carbon dioxide to transform into high-pressure supercritical carbon dioxide to achieve expansion work for drainage, the drainage capacity is strong and safe and reliable.

[0007] When a large flow rate of rapid drainage is required in the ballast tank, the control unit controls the first on-off valve to open, and the high-pressure air in the second storage chamber is discharged to the ballast tank through the first connection pipeline for drainage; after the liquid carbon dioxide in the first storage chamber is transformed into supercritical carbon dioxide, it is discharged to the decompression chamber, expands in the decompression chamber, and then enters the ballast tank for drainage. By using the phase change of high-pressure air and carbon dioxide simultaneously, large-flow drainage in the ballast tank is achieved.

[0008] The drainage system of the embodiment of the present application can adjust the drainage capacity by adjusting the independent drainage or joint drainage of the first power unit and the second power unit, so as to achieve the goal of adjusting the drainage capacity according to the working condition requirements. The present invention uses liquid carbon dioxide and compressed air as working media, and the cost is extremely low. After filling, it can be used again, and the maintenance and guarantee costs are low.

[0009] Optionally, the second power unit includes a plurality of compressed air cylinders, the second storage chamber includes a plurality of second sub-storage chambers, and each compressed air cylinder has the second sub-storage chamber; each compressed air cylinder is connected to the first connection pipeline through a second connection pipeline, and a second on-off valve is arranged on each second connection pipeline, and each second on-off valve is communicatively connected to the control unit.

[0010] A second connection pipeline is connected between the second sub-storage chamber corresponding to each compressed air cylinder and the first connection pipeline, and a second on-off valve is arranged on the second connection pipeline. The control unit can control the opening or closing of each second on-off valve according to the actual working condition requirements, so as to control different numbers of second sub-storage chambers to be connected to the first connection pipeline, thereby realizing the requirements of different drainage flow rates.

[0011] Optionally, a plurality of first heating parts are arranged on the inner wall of the compressed air cylinder. The first heating parts extend along the axial direction of the compressed air cylinder, and the plurality of first heating parts are arranged at intervals along the circumferential direction of the compressed air cylinder. The first heating parts are communicatively connected to the control unit.

[0012] As the air in the second sub-storage chamber is discharged, the pressure in the second sub-storage chamber gradually decreases. By providing a first heating part on the inner wall of the compressed air bottle, when the pressure in the compressed air bottle is lower than a predetermined value, the control unit controls the first heating part to heat the air in the compressed air bottle, which can increase the air pressure and thus improve the drainage capacity.

[0013] Optionally, a heat insulation layer is provided on the inner wall surface and / or the outer wall surface of the compressed air bottle. The heat insulation layer is used to reduce the temperature loss in the second sub-storage chamber and improve the heat utilization efficiency in the second sub-storage chamber.

[0014] Optionally, the cross-section of the compressed air bottle in the axial direction is configured as a polygon, and the outer peripheral wall surfaces of any two adjacent compressed air bottles are in surface contact.

[0015] The surface contact between any two adjacent compressed air bottles reduces the gap between two adjacent compressed air bottles and reduces the space occupied by the compressed air bottles.

[0016] Optionally, a third connecting pipeline is connected between the pressure reducing unit and the ballast tank, and a check valve is provided on the third connecting pipeline. A third connecting pipeline is connected between the ballast tank and the pressure reducing unit to discharge the gas in the pressure reducing chamber to the ballast tank. Among them, the check valve can reduce the backflow of the gas entering the ballast tank.

[0017] Optionally, the first power unit has a first outlet, the first storage chamber is communicated with the first outlet, the pressure reducing unit also has a first inlet and a second outlet, both the first inlet and the second outlet are communicated with the pressure reducing chamber, and the second outlet is connected to the third connecting pipeline; the first power unit further includes a pressure relief unit, the pressure relief unit is blocked between the first inlet and the first outlet, and the pressure relief unit is configured to open when the pressure in the first storage chamber is greater than a preset value to communicate the first inlet and the first outlet.

[0018] The pressure relief unit blocks the first inlet and the first outlet in the normal state to prevent liquid carbon dioxide from entering the pressure reducing chamber. When the liquid carbon dioxide in the first power unit turns into supercritical carbon dioxide, resulting in the pressure in the first storage chamber of the first power unit exceeding the preset value, the pressure relief unit opens to communicate the first inlet and the first outlet, and the carbon dioxide will enter the pressure reducing unit for pressure reduction.

[0019] Optionally, a second heating part is provided in the first storage chamber, and the second heating part is communicatively connected to the control unit. The control unit controls the second heating part to heat the liquid carbon dioxide in the first storage chamber, so that the liquid carbon dioxide absorbs heat and undergoes a phase change to be converted into high-pressure supercritical carbon dioxide.

[0020] Optionally, the pressure reducing unit includes a plurality of sub-pressure reducing units which are connected in sequence. Along the arrangement direction of the plurality of sub-pressure reducing units, the first inlet and the second outlet are respectively arranged on two sub-pressure reducing units at the head and the tail ends.

[0021] A plurality of sub-pressure reducing chambers are connected in series in sequence, so that the high-pressure supercritical carbon dioxide discharged from the first power unit can be decompressed in one sub-pressure reducing chamber and then further decompressed in the next sub-pressure reducing chamber, so that the carbon dioxide is fully expanded.

[0022] Optionally, the plurality of sub-pressure reducing units include a first pressure reducing unit and a second pressure reducing unit, the pressure reducing chambers include a first pressure reducing chamber and a second pressure reducing chamber, the first pressure reducing chamber is arranged in the first pressure reducing unit, the second pressure reducing chamber is arranged in the second pressure reducing unit, the first inlet is arranged on the first pressure reducing unit, and the second outlet is arranged on the second pressure reducing unit; along the first direction, both the first power unit and the second pressure reducing unit are located on the same side of the first pressure reducing unit.

[0023] The size of the drainage device in the first direction can be reduced, the volume of the drainage device is reduced, and the volume of the drainage device is made more compact. At the same time, arranging the first power unit and the second pressure reducing unit on the same side of the first pressure reducing unit in the first direction can also facilitate fixing the first power unit and the second pressure reducing unit to the first pressure reducing unit.

[0024] Optionally, the size of the first pressure reducing unit in the first direction is smaller than the size of the first pressure reducing unit in the second direction, and the size of the first pressure reducing unit in the first direction is smaller than the size of the first pressure reducing unit in the third direction. Along the first direction, the projection of the second pressure reducing unit falls into the central area of the first pressure reducing unit, and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0025] The first pressure reducing unit is configured as a flat structure, and the first power unit and the second pressure reducing unit are arranged on the same side of the first pressure reducing unit in the thickness direction. At the same time, the space occupied by the flat first pressure reducing unit in the first direction is reduced, which is convenient for the drainage device to be stored in the first direction.

[0026] In addition, the high-pressure carbon dioxide discharged from the first power unit or the air discharged from the second power unit can be fully decompressed in the first pressure reducing unit and then enter the second pressure reducing unit from the first inlet, thereby improving the decompression efficiency and decompression effect of the high-pressure carbon dioxide or compressed air.

[0027] Optionally, there are a plurality of the first power units, which are arranged around the second pressure reduction unit along the circumferential direction of the first pressure reduction unit. This ensures that the high-pressure carbon dioxide discharged by each first power unit can be fully decompressed within the first pressure reduction unit, improving the decompression efficiency.

[0028] Optionally, the drainage device further includes a pressing plate, which is arranged at an interval from the first pressure reduction unit along the first direction, and the first power unit and the second pressure reduction unit are clamped between the first pressure reduction unit and the pressing plate. By providing the pressing plate, the first power unit and the second pressure reduction unit can be clamped and fixed between the pressing plate and the first pressure reduction unit, making the overall drainage device more firm and stable.

[0029] Optionally, the drainage device further includes a pull rod, and both ends of the pull rod are respectively connected to the first pressure reduction unit and the pressing plate along the first direction. The pull rod can fix the first pressure reduction unit and the pressing plate together, improving the structural stability of the drainage device.

[0030] In a second aspect, the present application further provides a vehicle, including the drainage system according to any one of the above embodiments.

[0031] Since the underwater vehicle according to the embodiment of the present application is provided with the above drainage system, the drainage capacity can be adjusted by adjusting the discharge amount of liquid carbon dioxide or compressed air as needed, achieving the goal of adjusting the drainage capacity according to the working conditions, so that the underwater vehicle can adapt to more scenarios. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Schematic diagram of the drainage system of the present application; Figure 2 Schematic diagram of the structure of the compressed air cylinder of the present application; Figure 3 Cross-sectional schematic diagram of the second power unit of the present application; Figure 4 Partial structural schematic diagram of the drainage device of the present application; Figure 5 Schematic diagram of the structure of the pressure reduction unit of the present application; Figure 6 Schematic diagram of the structure of the gas recovery device of the present application.

[0034]

Description of the Attached Drawing Reference Signs

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the description of this application in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above accompanying drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0037] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0038] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", "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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] The term "and / or" in this application is merely a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0040] The term "a plurality of" appearing in this application refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0041] Currently, when accidents such as rudder jamming, water ingress, and depth drop occur to an underwater vehicle, it is necessary to quickly discharge a part of the stored seawater within a short time to provide positive buoyancy and achieve the safe floating of the underwater vehicle.

[0042] Currently, the main solutions adopted by medium and large-sized underwater vehicles are compressed air drainage devices or high-temperature gas drainage devices. The compressed air drainage device pre-compresses and pressurizes air and stores it in a high-pressure air cylinder. When needed, the valve on the connecting pipeline between the air cylinder and the storage water tank is opened, and the high-pressure air is introduced into the water tank to discharge the internal seawater; the high-temperature gas drainage device seals solid agents in a gas generator. When needed, the agents are ignited by an electrical signal, causing the agents to undergo a chemical reaction to form high-temperature gas, which is injected into the water tank to discharge the internal seawater.

[0043] As the working depth of the underwater vehicle gradually increases, the compressed air drainage is greatly affected by the back pressure, and the drainage capacity decreases significantly; the gases such as carbon monoxide and hydrogen generated by the high-temperature gas drainage have potential secondary combustion hazards and are also not conducive to safety.

[0044] Although the current drainage system can use compressed air, the pressure that compressed air can provide is limited, and the pressure continuously decreases during use, thus limiting the drainage capacity.

[0045] Therefore, this application proposes a drainage system that is safe, efficient, and has adjustable drainage capacity, which can provide new guarantees for the navigation safety of underwater vehicles.

[0046] In the first aspect, referring to Figure 1 , an embodiment of this application provides a drainage system with an internal linkage of compressed air and carbon dioxide, including a drainage device 1, a ballast tank 2, a first connecting pipeline 3, and a control unit 4. The drainage device 1 includes a first power unit 11, a second power unit 12, and a pressure reducing unit 13. A first storage chamber for storing liquid carbon dioxide is provided in the first power unit 11, a second storage chamber for storing high-pressure air is provided in the second power unit 12, a pressure reducing chamber is provided in the pressure reducing unit 13, and the first storage chamber and the second storage chamber can be selectively communicated with the pressure reducing chamber; the ballast tank 2 has a third storage chamber for accommodating water, and the third storage chamber can be selectively communicated with the pressure reducing chamber; the first connecting pipeline 3 is respectively connected to the second power unit 12 and the pressure reducing unit 13, and a first on-off valve 31 is provided on the first connecting pipeline 3; the control unit 4 is communicatively connected to the first power unit 11, and the first power unit 11 is adapted to convert liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit 4 and enter the third storage chamber after being decompressed by the pressure reducing chamber. The control unit 4 is communicatively connected to the first on-off valve 31 to selectively connect the second storage chamber and the pressure reducing chamber through the first connecting pipeline 3.

[0047] In the drainage system proposed in the embodiment of this application, high-pressure air is stored in the second storage chamber of the second power unit 12. When the ballast tank 2 needs to drain water, the control unit 4 controls the first on-off valve 31 to connect the second storage chamber and the pressure reducing chamber. The high-pressure air in the second storage chamber is discharged to the pressure reducing chamber through the first connecting pipeline 3. The high-pressure air expands in the pressure reducing chamber and is then discharged from the pressure reducing chamber to the ballast tank 2 for drainage.

[0048] Carbon dioxide is in a liquid state at a certain pressure and temperature, has a large density, and is convenient to store. Liquid carbon dioxide can be quickly converted into a supercritical state by increasing the temperature and pressure, with its volume expanding several times, strong instantaneous work capacity, and being 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. By using the heat absorption of liquid carbon dioxide to be converted into high-pressure supercritical carbon dioxide to achieve expansion work for drainage, the drainage capacity is strong and it is safe and reliable.

[0049] Specifically, the opening and closing of the first on-off valve 31 can be used to selectively control the amount of air entering the ballast tank 2 by the pressure reducing unit 13. Optionally, the first on-off valve 31 can adjust the size of the valve port, thereby adjusting the speed of the air entering the ballast tank 2 by the pressure reducing unit 13, thus improving the stability of the drainage system 200.

[0050] When a large flow rate of rapid drainage is required in the ballast tank 2, the control unit 4 controls the first on-off valve 31 to open, and the high-pressure air in the second storage chamber is discharged to the ballast tank 2 through the first connecting pipeline 3 for drainage; after the liquid carbon dioxide in the first storage chamber is converted into supercritical carbon dioxide, it is discharged to the decompression chamber, expands in the decompression chamber, and then enters the ballast tank 2 for drainage. By using the phase change of high-pressure air and liquid carbon dioxide simultaneously, large-flow drainage in the ballast tank 2 is achieved.

[0051] The drainage system of the embodiment of the present application combines the drainage technology of liquid carbon dioxide phase change and compressed air drainage. It can independently drain or jointly drain by adjusting the first power unit 11 and the second power unit 12, adjust the drainage capacity of the device, and achieve the goal of adjusting the drainage capacity according to the working conditions. The liquid carbon dioxide and compressed air working media used in the present invention have extremely low costs themselves, can be reused after filling, and have low maintenance and guarantee costs.

[0052] Optionally, referring to Figure 1 , the second power unit 12 includes a plurality of compressed air cylinders 121, the second storage chamber includes a plurality of second sub-storage chambers, and each compressed air cylinder 121 has a second sub-storage chamber; each compressed air cylinder 121 is connected to the first connecting pipeline 3 through a second connecting pipeline 5, and a second on-off valve is provided on each second connecting pipeline 5, and each second on-off valve is communicatively connected to the control unit 4.

[0053] A second connecting pipeline 5 is connected between the second sub-storage chamber corresponding to each compressed air cylinder 121 and the first connecting pipeline 3, and a second on-off valve is provided on the second connecting pipeline 5. The control unit 4 can control the opening or closing of each second on-off valve according to the actual working conditions, so as to control different numbers of second sub-storage chambers to communicate with the first connecting pipeline 3, thereby meeting the requirements of different drainage flow rates.

[0054] Optionally, referring to Figure 2 , a plurality of first heating parts 122 are provided on the inner wall of the compressed air cylinder 121. The first heating parts 122 extend along the axial direction of the compressed air cylinder 121, and the plurality of first heating parts 122 are arranged at intervals along the circumferential direction of the compressed air cylinder 121. The first heating parts 122 are communicatively connected to the control unit 4.

[0055] As the air in the second sub-storage chamber is discharged, the pressure in the second sub-storage chamber gradually decreases. By providing a first heating portion 122 on the inner wall of the compressed air cylinder 121. The first heating portion 122 can be a PTC heating sheet. When the pressure in the compressed air cylinder 121 is lower than a predetermined value, the control unit 4 controls the first heating portion 122 to heat the air in the compressed air cylinder 121, increasing the air pressure, thereby enhancing the drainage capacity.

[0056] In a specific embodiment, a pressure monitoring unit is provided at the outlet of the compressed air cylinder 121. When the pressure monitoring unit detects that the pressure in the compressed air cylinder 121 is lower than a predetermined value, the pressure monitoring unit transmits a signal to the control unit 4, and the control unit 4 controls the first heating portion 122 to heat the air in the compressed air cylinder 121, increasing the air pressure, thereby enhancing the drainage capacity.

[0057] Optionally, refer to Figure 2 , a heat insulation layer 123 is provided on the inner wall surface and / or the outer wall surface of the compressed air cylinder 121. The heat insulation layer 123 is provided on the inner wall surface or the outer wall surface of the compressed air cylinder 121, or both the inner wall surface and the outer wall surface of the compressed air cylinder 121 are provided with the heat insulation layer 123, reducing the temperature loss in the second sub-storage chamber and enhancing the heat utilization efficiency in the second sub-storage chamber.

[0058] Optionally, refer to Figure 3 , the cross-section of the compressed air cylinder 121 in the axial direction is configured as a polygon, and the outer peripheral wall surfaces of any two adjacent compressed air cylinders 121 are in surface contact. The outer peripheral wall surfaces of any two adjacent compressed air cylinders 121 are in surface contact, reducing the gap between two adjacent compressed air cylinders 121 and reducing the space occupied by the compressed air cylinders 121. In a specific embodiment, the projection of the compressed air cylinder 121 in its axial direction can be configured as a regular hexagon, and the outer peripheral walls of any two adjacent compressed air cylinders 121 are in contact, reducing the space occupied by the second power unit 12.

[0059] It should be understood that along the axial direction of the compressed air cylinder 121, the inner wall projection of the compressed air cylinder 121 can be circular to ensure the pressure-bearing capacity of the compressed air cylinder 121; the outer wall projection of the compressed air cylinder 121 is a regular hexagon to reduce the space occupied by multiple compressed air cylinders 121.

[0060] Optionally, refer to Figure 1 , a third connecting pipeline 6 is connected between the pressure reducing unit 13 and the ballast tank 2, and a check valve 7 is provided on the third connecting pipeline 6. The third connecting pipeline 6 is connected between the ballast tank 2 and the pressure reducing unit 13 to discharge the gas in the pressure reducing chamber to the ballast tank 2. Among them, the check valve 7 can reduce the backflow of the gas entering the ballast tank 2 and enhance the drainage stability of the ballast tank 2.

[0061] Optionally, with reference to Figure 4 and Figure 5 , the first power unit 11 has a first outlet, the first storage chamber communicates with the first outlet, the decompression unit 13 further has a first inlet 133 and a second outlet 134, both the first inlet 133 and the second outlet 134 communicate with the decompression chamber, and the second outlet 134 is connected to the third connecting pipeline 6; the first power unit 11 further includes a pressure relief unit, the pressure relief unit is blocked between the first inlet 133 and the first outlet, and the pressure relief unit is configured to open when the pressure in the first storage chamber is greater than a preset value, so as to communicate the first inlet 133 with the first outlet.

[0062] The pressure relief unit blocks the first inlet 133 and the first outlet in the normal state, preventing liquid carbon dioxide from entering the decompression chamber. When the liquid carbon dioxide in the first power unit 11 turns into supercritical carbon dioxide, causing the pressure in the first storage chamber of the first power unit 11 to exceed the preset value, the pressure relief unit opens, thus communicating the first inlet 133 with the first outlet, and the gaseous carbon dioxide will enter the decompression unit 13 for decompression.

[0063] Among them, the first power unit 11 can be configured as a metal tank with sufficient strength, and the metal tank can store liquid carbon dioxide with a very high pressure.

[0064] The first outlet communicates with the first storage chamber. Under some specific conditions, the liquid carbon dioxide can turn into a supercritical state and be discharged from the first outlet.

[0065] The decompression unit 13 has a decompression chamber, a first inlet 133 and a second outlet 134, and both the first inlet 133 and the second outlet 134 communicate with the decompression chamber. As the name implies, the decompression chamber in the decompression unit 13 can decompress the carbon dioxide gas discharged into the decompression unit 13. The pressure of the medium discharged from the first storage chamber or the second storage chamber is very high, and the medium with a higher pressure can enter the decompression chamber from the first inlet 133. At this time, the medium with a higher pressure can further expand in the decompression chamber. After that, the decompressed medium can be discharged from the second outlet 134.

[0066] The pressure relief unit is blocked between the first inlet 133 and the first outlet, 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 communicate the first inlet 133 with the first outlet.

[0067] Among them, 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, thus communicating the first inlet 133 with the first outlet. Thus, the high-pressure supercritical carbon dioxide can enter the decompression unit 13 for decompression and then be discharged from the second outlet 134.

[0068] Optionally, a second heating part is arranged in the first storage chamber, and the second heating part is communicatively connected to the control unit 4. The control unit 4 controls the second heating part to heat the liquid carbon dioxide in the first storage chamber, so that the liquid carbon dioxide absorbs heat and undergoes a phase change to be converted into high-pressure supercritical carbon dioxide.

[0069] Among them, the second heating part can be an excitation member, the excitation member includes an excitation agent, and the excitation member can be communicatively connected to an external control unit 4. After receiving the excitation signal from the control unit 4, the excitation agent undergoes a chemical reaction, thereby generating heat, so that the liquid carbon dioxide absorbs heat and undergoes a phase change to be converted into high-pressure supercritical carbon dioxide.

[0070] The second heating part can also be a PTC heating sheet. The PTC heating sheet can be communicatively connected to an external control unit 4. After receiving the excitation signal from the control unit 4, heat is generated, so that the liquid carbon dioxide absorbs heat and undergoes a phase change to be converted into high-pressure supercritical carbon dioxide.

[0071] Optionally, the pressure reducing unit 13 includes a plurality of sub-pressure reducing units, and the plurality of sub-pressure reducing units are connected in series in sequence. Along the arrangement direction of the plurality of sub-pressure reducing units, a first inlet 133 and a second outlet 134 are respectively arranged at the two ends of the head and the tail.

[0072] It can be understood that a sub-pressure reducing chamber is arranged in each sub-pressure reducing unit, and the plurality of sub-pressure reducing chambers together form the above-mentioned pressure reducing chamber.

[0073] The plurality of sub-pressure reducing chambers are connected in series in sequence, so that the high-pressure supercritical carbon dioxide discharged from the first power unit 11 and / or the high-pressure air discharged from the second power unit 12 can be further decompressed in the next sub-pressure reducing chamber after being decompressed in one sub-pressure reducing chamber, so that the carbon dioxide and / or air can be fully expanded.

[0074] Optionally, referring to Figure 4 and Figure 5 , the plurality of sub-pressure reducing units include a first pressure reducing unit 131 and a second pressure reducing unit 132, the pressure reducing chamber includes a first pressure reducing chamber and a second pressure reducing chamber, the first pressure reducing chamber is arranged in the first pressure reducing unit 131, the second pressure reducing chamber is arranged in the second pressure reducing unit 132, the first pressure reducing unit 131 is provided with a first inlet 133, and the second pressure reducing unit 132 is provided with a second outlet 134; along the first direction A, both the first power unit 11 and the second pressure reducing unit 132 are located on the same side of the first pressure reducing unit 131.

[0075] The first pressure reduction chamber and the second pressure reduction chamber are connected in series. Along the flow direction of carbon dioxide, the first pressure reduction chamber is closer to the first power unit 11 than the second pressure reduction chamber. After the pressure release unit is opened, the high-pressure supercritical carbon dioxide in the first power unit 11 will first enter the first pressure reduction chamber for pressure reduction, then enter the second pressure reduction chamber for pressure reduction, and finally be discharged from the second outlet 134.

[0076] Along the first direction A, both the first power unit 11 and the second pressure reduction unit 132 are located on the same side of the first pressure reduction unit 131. This can reduce the size of the drainage device 1 in the first direction A, reduce the volume of the drainage device 1, and make the volume of the drainage device 1 more compact. At the same time, arranging the first power unit 11 and the second pressure reduction unit 132 on the same side of the first pressure reduction unit 131 in the first direction A can also facilitate the fixation of the first power unit 11 and the second pressure reduction unit 132 to the first pressure reduction unit 131.

[0077] Optionally, referring to Figure 5 , the size of the first pressure reduction unit 131 in the first direction A is smaller than the size of the first pressure reduction unit 131 in the second direction B, and the size of the first pressure reduction unit 131 in the first direction A is smaller than the size of the first pressure reduction unit 131 in the third direction C. Along the first direction A, the projection of the second pressure reduction unit 132 falls into the central area of the first pressure reduction unit 131, and the first direction A, the second direction B, and the third direction C are perpendicular to each other in pairs.

[0078] That is to say, the first pressure reduction unit 131 is configured as a flat structure, and the first power unit 11 and the second pressure reduction unit 132 are arranged on the same side of the first pressure reduction unit 131 in the thickness direction. At the same time, the space occupied by the flat first pressure reduction unit 131 in the first direction A is reduced, which is convenient for the drainage device 1 to be accommodated in the first direction A.

[0079] According to some embodiments of the present application, along the first direction A, the projection of the second pressure reduction unit 132 falls into the central area of the first pressure reduction unit 131. Thus, the high-pressure gaseous carbon dioxide discharged from the first power unit 11 or the air discharged from the second power unit 12 can be fully decompressed in the first pressure reduction unit 131 and then enter the second pressure reduction unit 132 from the first inlet 133, thereby improving the decompression efficiency and decompression effect of the high-pressure gaseous carbon dioxide or compressed air.

[0080] Optionally, referring to Figure 4 , there are multiple first power units 11, and the multiple first power units 11 are arranged around the second pressure reduction unit 132 along the circumferential direction of the first pressure reduction unit 131.

[0081] The drainage device 1 may include a plurality of first power units 11, which are arranged in sequence along the circumferential direction of the first pressure reduction unit 131, and the plurality of first power units 11 are arranged in sequence along the radial direction of the first pressure reduction unit 131.

[0082] Thereby, it is ensured that the high-pressure supercritical carbon dioxide discharged by each first power unit 11 can be fully depressurized within the first pressure reduction unit 131, improving the pressure reduction efficiency.

[0083] Optionally, referring to Figure 4 , the drainage device 1 further includes a pressing plate 14. Along the first direction A, the pressing plate 14 is spaced apart from the first pressure reduction unit 131, and the first power unit 11 and the second pressure reduction unit 132 are clamped between the first pressure reduction unit 131 and the pressing plate 14.

[0084] The first power unit 11 may be a cylindrical structure extending along the first direction A. Similarly, the second pressure reduction unit 132 may also be a cylindrical structure extending along the first direction A. For convenience, while fixing the first power unit 11 and the second pressure reduction unit 132 at the same time, the dimension of the first power unit 11 in the first direction A is substantially the same as the dimension of the second pressure reduction unit 132 in the first direction A.

[0085] By providing the pressing plate 14, the first power unit 11 and the second pressure reduction unit 132 can be clamped and fixed between the pressing plate 14 and the first pressure reduction unit 131, making the overall drainage device 1 more firm and stable.

[0086] Optionally, referring to Figure 4 , the drainage device 1 further includes a tie rod 15. Along the first direction A, both ends of the tie rod 15 are respectively connected to the first pressure reduction unit 131 and the pressing plate 14.

[0087] The tie rod 15 can tighten the pressing plate 14 and the first pressure reduction unit 131. The tie rod 15 can be configured as a long bolt. One end of the bolt head of the long bolt abuts against one of the first pressure reduction unit 131 and the pressing plate 14, and the bolt rod of the long bolt can pass through the other of the first pressure reduction unit 131 and the pressing plate 14 and is fastened by a nut. By tightening or loosening the nut, the distance between the pressing plate 14 and the first pressure reduction unit 131 can be changed, thereby fixing the pressing plate 14 and the first pressure reduction unit 131, or disassembling the pressing plate 14 and the first pressure reduction unit 131.

[0088] According to some embodiments of the present application, the drainage device 1 further includes a pressure sensor 17, and the pressure sensor 17 is disposed on the first pressure reduction unit 131 to detect the gas pressure change within the first pressure reduction unit 131.

[0089] The pressure sensor 17 can understand the pressure inside the first pressure reducing unit 131 in real time, so as to selectively open one or more pressure relief units, and introduce the supercritical carbon dioxide of one or more first power units 11 into the first pressure reducing unit 131; alternatively, the pressure sensor 17 can understand the pressure inside the first pressure reducing unit 131 in real time, so as to selectively open one or more second on-off valves, and introduce the compressed air of one or more compressed air cylinders 121 into the first pressure reducing unit 131.

[0090] According to some embodiments of the present application, the drainage device 1 further includes an overpressure protection device 16, and the overpressure protection device 16 is arranged in the first pressure reducing unit 131 to protect the first pressure reducing unit 131 and the second pressure reducing unit 132. As the name implies, the overpressure protection device 16 can play a protective role and reduce the probability of damaging the first pressure reducing unit 131 and the second pressure reducing unit 132 due to excessive pressure in the first pressure reducing unit 131.

[0091] When the pressure of carbon dioxide and / or air in the first pressure reducing unit 131 exceeds the designed safety value, the overpressure protection device 16 can be automatically opened to release carbon dioxide and reduce the pressure, so as to protect the structural safety of the first pressure reducing unit 131 and the second pressure reducing unit 132.

[0092] In some embodiments of the present application, a rectifying member is arranged in the second pressure reducing cavity. The rectifying member can rectify the flow of carbon dioxide and / or air in the second pressure reducing cavity, so that carbon dioxide and / or air can be discharged from the second outlet 134 with a relatively gentle pressure. Of course, the rectifying member can further disturb the carbon dioxide, thereby improving the pressure reducing efficiency.

[0093] Optionally, the rectifying member can be arranged on the inner wall of the second pressure reducing unit 132, and the rectifying member can be configured as a convex portion protruding from the inner wall of the second pressure reducing unit 132. Along the first direction A, the inner wall of the second pressure reducing unit 132 can be divided into multiple inner wall regions, and the multiple inner wall regions include adjacent first inner wall region and second inner wall region. The first inner wall region is closer to the first pressure reducing unit 131 than the second inner wall region, and the density of the rectifying member in the first inner wall region is greater than the density of the rectifying member in the second inner wall region. That is to say, the number of rectifying members per unit area in the first inner wall region is greater than the number of rectifying members per unit area in the second inner wall region. Thus, the pressure of carbon dioxide can be made more uniform.

[0094] In an alternative embodiment, refer to Figure 6, the drainage device 1 further includes a gas recovery device 8. The gas recovery device 8 includes a gas-liquid separation component 81, a gas capture component 82, a recovery chamber 83, a cooling component 84, a compression component 85, and a storage component. The gas-liquid separation component 81 is disposed between the ballast tank 2 and the drainage port. The gas capture component 82 is communicated with the chamber of the gas-liquid separation component 81. The recovery chamber 83 is communicated with the gas capture component 82. The cooling component 84 is disposed in the recovery chamber 83. The compression component 85 is disposed at the outlet of the recovery chamber 83. The storage component may be a high-pressure storage tank for collecting and storing gas.

[0095] Specifically, a gas-liquid separation component 81 is disposed between the ballast tank 2 and the drainage port. The gas-liquid separation component 81 is connected to the gas capture component 82. The gas capture component 82 prevents gas from escaping through physical isolation (such as an elastic airbag) and collects the gas in the elastic airbag. When draining water, the gas-liquid mixture enters the chamber of the gas-liquid separation component 81. The liquid sinks due to gravity and is discharged from the bottom, and the gas is collected by the gas capture component 82.

[0096] The gas collected by the gas capture component 82 enters the recovery chamber 83. The cooling component 84 is disposed in the recovery chamber 83. The cooling component 84 may be a cooling coil or a cooling fan to cool the high-temperature gas. The compression component 85 may be a compression pump or a compressor to compress the gas drained from the recovery chamber 83, so as to collect the compressed gas in the storage component.

[0097] Among them, the storage component may be a first power unit 11 and a second power unit 12. The compression component 85 is communicated with the first power unit 11 and the second power unit 12, and a valve is disposed between the compression component 85, the first power unit 11, and the second power unit 12. When the gas in a certain power unit is emptied, the control unit 4 controls the valve to open, so as to collect the gas recovered in the gas recovery device 8 in this power unit, thereby realizing the reuse of gas, reducing the operating cost, and being able to reduce the carbon dioxide emissions and the impact of carbon dioxide on the marine ecosystem.

[0098] In another alternative embodiment, considering the energy recovery and utilization, a heat energy recovery component is disposed inside the fairing. The heat energy recovery component includes heat exchangers such as shell-and-tube type, plate type, or fin type. The heat exchanger is made of corrosion-resistant and high-pressure-resistant materials. The heat energy recovery component further includes a heat energy storage part and a heat energy conversion part. The heat conduction medium in the heat exchanger absorbs waste heat and the temperature rises, and transfers the heat to the heat energy storage part. The heat energy storage part stores the recovered heat energy through a phase change material storage tank or a hot water storage tank. The heat energy conversion part may be a thermoelectric generator or a steam turbine to convert the heat energy into electric energy, thereby increasing the endurance of the underwater vehicle.

[0099] In a second aspect, the present application also provides an underwater vehicle, including the drainage system described in any of the above embodiments.

[0100] Since the underwater vehicle according to the embodiment of the present application is provided with the above drainage system, the drainage capacity can be adjusted by adjusting the discharge amount of liquid carbon dioxide or compressed air as needed, so as to achieve the goal of adjusting the drainage capacity according to the working conditions. As a result, the underwater vehicle can adapt to more scenarios, with flexible usage strategies, and greatly enhanced drainage capacity and usability. And it can be used for retrofitting various vehicles.

[0101] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the said element.

[0102] Each embodiment in this specification is described in a progressive manner. The same or similar parts among 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 refer to the partial description of the method embodiment.

[0103] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

[0104] Although the embodiments of the present application are 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 the present application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A built-in compressed air and carbon dioxide linkage drainage system, characterized in that: include: A drainage device, comprising a first power unit, a second power unit and a decompression unit, wherein the first power unit is provided with a first storage chamber for storing liquid carbon dioxide, the second power unit is provided with a second storage chamber for storing high-pressure air, the decompression unit is provided with a decompression chamber, and the first storage chamber and the second storage chamber can both be selectively connected to the decompression chamber; a ballast water tank having a third storage chamber for containing water, the third storage chamber selectively communicating with the decompression chamber; a first connecting pipeline, the first connecting pipeline being connected to the second power unit and the decompression unit respectively, and a first on-off valve being arranged on the first connecting pipeline; A control unit, wherein the control unit is communicatively connected to the first power unit, the first power unit is suitable for converting liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit and entering the third storage chamber after being decompressed by the decompression chamber, and the control unit is communicatively connected to the first on-off valve so that the first connecting pipeline can selectively connect the second storage chamber and the decompression chamber.

2. The drainage system according to claim 1, characterized in that: The second power unit includes a plurality of compressed air bottles, the second storage chamber includes a plurality of second sub-storage chambers, and each of the compressed air bottles has the second sub-storage chamber; Each of the compressed air bottles is connected to the first connecting pipeline via a second connecting pipeline, each of the second connecting pipelines is provided with a second on-off valve, and each of the second on-off valves is communicatively connected to the control unit.

3. The drainage system according to claim 2, characterized in that: A plurality of first heating parts are provided on the inner wall of the compressed air bottle, each of the first heating parts extends along the axial direction of the compressed air bottle, and the plurality of first heating parts are arranged at intervals along the circumference of the compressed air bottle, and the first heating parts are communicatively connected with the control unit.

4. The drainage system according to claim 3, characterized in that: The inner wall surface of the compressed air bottle and / or the outer wall surface of the compressed air bottle are provided with a heat-insulating layer.

5. The drainage system according to claim 3, characterized in that: The cross section of the compressed air bottle in the axial direction is configured as a polygon, and the outer peripheral walls of any two adjacent compressed air bottles are in surface contact.

6. The drainage system according to claim 1, characterized in that: A third connecting pipeline is connected between the decompression unit and the ballast water tank, and a check valve is arranged on the third connecting pipeline.

7. The drainage system according to claim 6, characterized in that: The first power unit has a first outlet, the first storage chamber is connected to the first outlet, the decompression unit further has a first inlet and a second outlet, the first inlet and the second outlet are both connected to the decompression chamber, and the second outlet is connected to the third connecting pipeline; The first power unit further includes a pressure relief unit, which is blocked between the first inlet and the first outlet. The pressure relief unit is configured to open when the pressure in the first storage chamber is greater than a preset value to connect the first inlet with the first outlet.

8. The drainage system according to claim 7, characterized in that: A second heating unit is disposed in the first storage chamber, and the second heating unit is communicatively connected to the control unit.

9. The drainage system according to claim 7, characterized in that: The decompression unit includes a plurality of sub-decompression units, which are connected in sequence. Along the arrangement direction of the plurality of sub-decompression units, two of the sub-decompression units at the head and tail ends are respectively provided with the first inlet and the second outlet.

10. The drainage system according to claim 9, characterized in that: The plurality of sub-decompression units include a first decompression unit and a second decompression unit, the decompression chamber includes a first decompression chamber and a second decompression chamber, the first decompression chamber is arranged in the first decompression unit, the second decompression chamber is arranged in the second decompression unit, the first decompression unit is provided with the first inlet, and the second decompression unit is provided with the second outlet; Along the first direction, the first power unit and the second decompression unit are both located on the same side of the first decompression unit.

11. The drainage system according to claim 10, characterized in that: The size of the first decompression unit in the first direction is smaller than the size of the first decompression unit in the second direction, and the size of the first decompression unit in the first direction is smaller than the size of the first decompression unit in the third direction. Along the first direction, the projection of the second decompression unit falls into the central area of ​​the first decompression unit, and the first direction, the second direction and the third direction are perpendicular to each other.

12. The drainage system according to claim 11, characterized in that: There are a plurality of the first power units, and along the circumference of the first decompression unit, the plurality of the first power units are arranged around the second decompression unit.

13. The drainage system according to claim 10, characterized in that: The drainage device further includes a pressing plate, which is spaced apart from the first decompression unit along the first direction, and the first power unit and the second decompression unit are sandwiched between the first decompression unit and the pressing plate.

14. The drainage system according to claim 13, characterized in that: The drainage device further includes a pull rod, and along the first direction, two ends of the pull rod are respectively connected to the first decompression unit and the pressure plate.

15. An aircraft, characterized in that: A drainage system comprising the following claim 1.

Images