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

Abstract

The application relates to the field of aircraft technology, in particular to an inbuilt compressed air and carbon dioxide linkage drainage system and an aircraft. The drainage system comprises a drainage device, a ballast water tank, a first connecting pipeline and a control unit, a first power unit is internally provided with a first storage chamber for storing liquid carbon dioxide, a second power unit is internally provided with a second storage chamber for storing high-pressure air, a decompression unit is internally provided with a decompression chamber, the first storage chamber and the second storage chamber are selectively communicated with the decompression chamber; the ballast water tank is provided with a third storage chamber selectively communicated with the decompression chamber; the first connecting pipeline is connected with the second power unit and the decompression unit, and a first on-off valve is arranged on the first connecting pipeline; the first power unit is suitable for, under the control of the control unit, changing the liquid carbon dioxide into high-pressure supercritical carbon dioxide, and the high-pressure supercritical carbon dioxide is decompressed by the decompression chamber and then enters the third storage chamber, so that the first connecting pipeline selectively communicates the second storage chamber and the decompression chamber.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to an internal compressed air and carbon dioxide linkage drainage system and vehicle. BACKGROUND

[0002] At present, when the underwater vehicle is in the unexpected situation of stuck rudder, water ingress, and depth drop, it is necessary to quickly drain part of the stored seawater in a short time to provide positive buoyancy and realize the safe floating of the underwater vehicle. At present, the high-temperature gas drainage system is mainly used for medium and large underwater vehicles. The high-temperature gas drainage system seals solid propellants in the gas generator. When needed, the propellants are ignited by an electric signal to make the propellants react chemically to form high-temperature gas, which is injected into the water tank to drain the seawater inside the underwater vehicle. With the gradual increase of the working depth of the underwater vehicle, the compressed air drainage is greatly affected by the back pressure, and the drainage capacity decreases significantly; the carbon monoxide and hydrogen gas generated by the high-temperature gas drainage has the risk of secondary combustion, which is not conducive to safety. SUMMARY

[0003] The present application provides an internal compressed air and carbon dioxide linkage drainage system and vehicle, which has adjustable drainage capacity, safety and high efficiency.

[0004] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application includes:

[0005] In a first aspect, the present application provides an internal compressed air and carbon dioxide linkage drainage system, which comprises a drainage device, a ballast water tank, a first connecting pipeline and a control unit. The drainage device comprises a first power unit, a second power unit and a pressure reduction unit. 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 pressure reduction unit is provided with a pressure reduction chamber. The first storage chamber and the second storage chamber are selectively communicated with the pressure reduction chamber. The ballast water tank has a third storage chamber for containing water, which is selectively communicated with the pressure reduction chamber. The first connecting pipeline is connected with the second power unit and the pressure reduction unit, respectively, and is provided with a first on-off valve. The control unit is in communication connection with the first power unit. The first power unit is adapted to convert the liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit and make the high-pressure supercritical carbon dioxide enter the third storage chamber after being reduced in pressure by the pressure reduction chamber. The control unit is in communication connection with the first on-off valve to selectively connect the second storage chamber and the pressure reduction chamber through the first connecting pipeline.

[0006] The drainage system provided by the embodiments of the present application has the second storage chamber of the second power unit storing high-pressure air, and when the ballast tank needs to be drained, the control unit controls the first on-off valve to communicate 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 connecting pipeline, the high-pressure air expands in the decompression chamber, and then is discharged from the decompression chamber to the ballast tank for drainage.

[0007] After the liquid carbon dioxide in the first storage chamber is converted into supercritical carbon dioxide, the volume expands greatly, and the heat absorption of the liquid carbon dioxide is used to convert the supercritical carbon dioxide into high-pressure supercritical carbon dioxide to realize expansion work for drainage, which is strong in drainage capacity and safe and reliable.

[0008] When the ballast tank needs to be rapidly drained in a large flow, the control unit controls the first on-off valve to open, the high-pressure air in the second storage chamber is discharged to the ballast tank through the first connecting pipeline for drainage, and the liquid carbon dioxide in the first storage chamber is converted into supercritical carbon dioxide, discharged to the decompression chamber, expanded in the decompression chamber, and then enters the ballast tank for drainage. The large flow drainage in the ballast tank is realized by using the phase change of high-pressure air and carbon dioxide at the same time.

[0009] The drainage system of the embodiments of the present application can adjust the independent drainage or common drainage of the first power unit and the second power unit to adjust the drainage capacity of the device, so as to realize the target of adjusting the drainage capacity according to the working condition requirement. The liquid carbon dioxide and compressed air working medium used in the present application have extremely low cost, can be used again after filling, and have low maintenance and protection cost.

[0010] Optionally, the second power unit comprises a plurality of compressed air bottles, the second storage chamber comprises a plurality of second sub-storage chambers, each of the compressed air bottles has the second sub-storage chamber; each of the compressed air bottles is connected with the first connecting pipeline through 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 in communication connection with the control unit.

[0011] Each second sub-storage chamber corresponding to each compressed air bottle is connected with the first connecting pipeline through a second connecting pipeline, and a second on-off valve is arranged on the second connecting pipeline. The control unit can control the opening or closing of each second on-off valve according to the actual working condition requirement, so as to control the communication of different numbers of second sub-storage chambers with the first connecting pipeline, thereby realizing the requirement of different drainage flow.

[0012] Optionally, a plurality of first heating parts are arranged on the inner wall of the compressed air bottle, the first heating parts extend along the axial direction of the compressed air bottle, and the first heating parts are arranged at intervals along the circumferential direction of the compressed air bottle, and the first heating parts are in communication connection with the control unit.

[0013] As the pressure in the second sub-storage chamber gradually decreases with the discharge of air therein, by providing the first heating portion 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 portion to heat the air in the compressed air bottle, so as to increase the air pressure, thereby improving the drainage capacity.

[0014] Optionally, the inner wall surface of the compressed air bottle and / or the outer wall surface of the compressed air bottle is provided with a thermal insulation layer. The thermal 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.

[0015] Optionally, the compressed air bottle has a polygonal cross-sectional structure in the axial direction, and the outer peripheral wall surfaces of any two adjacent compressed air bottles are in surface contact.

[0016] The outer peripheral wall surfaces of any two adjacent compressed air bottles are in surface contact, which reduces the gap between the two adjacent compressed air bottles and reduces the space occupied by the compressed air bottles.

[0017] Optionally, a third connecting pipeline is connected between the pressure reduction unit and the ballast tank, and a check valve is arranged on the third connecting pipeline. The third connecting pipeline is connected between the pressure reduction unit and the ballast tank to discharge the gas in the pressure reduction chamber to the ballast tank, wherein the check valve can reduce the backflow of the gas into the ballast tank.

[0018] Optionally, the first power unit has a first outlet, the first storage chamber is in communication with the first outlet, the pressure reduction unit further has a first inlet and a second outlet, the first inlet and the second outlet are both in communication with the pressure reduction chamber, and the second outlet is connected to the third connecting pipeline; the first power unit further comprises 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 be opened when the pressure in the first storage chamber is greater than a preset value, so as to communicate the first inlet and the first outlet.

[0019] 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 reduction chamber. When the liquid carbon dioxide in the first power unit changes into supercritical carbon dioxide, causing the pressure in the first storage chamber of the first power unit to exceed the preset value, the pressure relief unit is opened to communicate the first inlet and the first outlet, and the carbon dioxide enters the pressure reduction unit for pressure reduction.

[0020] Optionally, the first storage chamber is provided with a second heating portion, and the second heating portion is in communication connection with the control unit. The control unit controls the second heating portion to heat the liquid carbon dioxide in the first storage chamber, so that the liquid carbon dioxide changes into high-pressure supercritical carbon dioxide after absorbing heat.

[0021] Optionally, the pressure reduction unit comprises a plurality of sub-pressure reduction units, the plurality of sub-pressure reduction units are sequentially communicated, and two sub-pressure reduction units at the two ends in the arrangement direction of the plurality of sub-pressure reduction units are respectively provided with the first inlet and the second outlet.

[0022] The plurality of sub-pressure reduction chambers are sequentially connected in series, so that the high-pressure supercritical carbon dioxide discharged from the first power unit can be further reduced in pressure in the next sub-pressure reduction chamber after being reduced in pressure in one sub-pressure reduction chamber, so that the carbon dioxide is fully expanded.

[0023] Optionally, the plurality of sub-pressure reduction units comprise a first pressure reduction unit and a second pressure reduction unit, the pressure reduction chamber comprises a first pressure reduction chamber and a second pressure reduction chamber, the first pressure reduction chamber is arranged in the first pressure reduction unit, the second pressure reduction chamber is arranged in the second pressure reduction unit, the first pressure reduction unit is provided with the first inlet, and the second pressure reduction unit is provided with the second outlet; along the first direction, the first power unit and the second pressure reduction unit are located on the same side of the first pressure reduction unit.

[0024] 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 more compact. At the same time, the first power unit and the second pressure reduction unit are arranged on the same side of the first pressure reduction unit in the first direction, which also facilitates fixing the first power unit and the second pressure reduction unit to the first pressure reduction unit.

[0025] Optionally, the size of the first pressure reduction unit in the first direction is smaller than the size of the first pressure reduction unit in the second direction, the size of the first pressure reduction unit in the first direction is smaller than the size of the first pressure reduction unit in the third direction, along the first direction, the projection of the second pressure reduction unit falls into the central region of the first pressure reduction unit, and the first direction, the second direction and the third direction are perpendicular to each other.

[0026] The first pressure reduction unit is configured as a flat structure, and the first power unit and the second pressure reduction unit are arranged on the same side of the first pressure reduction unit in the thickness direction. At the same time, the flat first pressure reduction unit reduces the space occupation in the first direction, facilitating the accommodation of the drainage device in the first direction.

[0027] 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 reduced in pressure in the first pressure reduction unit and then enter the second pressure reduction unit from the first inlet, thereby improving the pressure reduction efficiency and effect of the high-pressure carbon dioxide or compressed air.

[0028] Optionally, the first power unit is multiple, and the multiple first power units are arranged around the second pressure reduction unit along the circumference of the first pressure reduction unit. This ensures that the high-pressure carbon dioxide discharged by each first power unit can be fully reduced in pressure in the first pressure reduction unit, thereby improving the pressure reduction efficiency.

[0029] Optionally, the drainage device further comprises a pressing plate, which is arranged in the first direction and spaced apart from the first pressure reduction unit, and the first power unit and the second pressure reduction unit are clamped between the first pressure reduction unit and the pressing plate. By arranging 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, so that the overall drainage device is more firm and stable.

[0030] Optionally, the drainage device further comprises a pull rod, both ends of which are 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, thereby improving the structural stability of the drainage device.

[0031] In a second aspect, the present application also provides a vehicle comprising the drainage system according to any one of the above embodiments.

[0032] Since the underwater vehicle according to the embodiments of the present application is provided with the above drainage system, the discharge amount of liquid carbon dioxide or compressed air can be adjusted as needed to adjust the drainage capacity, so that the drainage capacity can be adjusted according to the working condition requirements, thereby making the underwater vehicle more adaptable to more scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0034] Figure 1 is a schematic view of the drainage system of the present application;

[0035] Figure 2 is a structural schematic view of the compressed air bottle of the present application;

[0036] Figure 3 is a sectional view of the second power unit of the present application;

[0037] Figure 4 is a partial structural schematic view of the drainage device of the present application;

[0038] Figure 5 is a structural schematic view of the pressure reduction unit of the present application;

[0039] Figure 6 Fig. 1 is a structural schematic diagram of a gas recovery device according to an embodiment of the present application.

[0040]

Explanation of Reference Numerals

[0041] 1: water drainage device; 11: first power unit; 12: second power unit; 121: compressed air bottle; 122: first heating portion; 123: thermal insulation layer; 13: pressure reduction unit; 131: first pressure reduction unit; 132: second pressure reduction unit; 133: first inlet; 134: second outlet; 14: pressing plate; 15: pull rod; 16: overpressure protection device; 17: pressure sensor;

[0042] 2: ballast water tank;

[0043] 3: first connecting pipeline; 31: first on-off valve;

[0044] 4: control unit;

[0045] 5: second connecting pipeline;

[0046] 6: third connecting pipeline;

[0047] 7: check valve;

[0048] 8: gas recovery device; 81: gas-liquid separation assembly; 82: gas capture assembly; 83: recovery chamber; 84: cooling assembly; 85: compression assembly;

[0049] A: first direction; B: second direction; C: third direction. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly literal sense unless expressly so defined by the patentee.

[0052] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that that described embodiments of the application are merely possible examples of implementations, and are not a limitation of the application, as broadly described.

[0053] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0054] The term "and / or" in the application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0055] "Multiple" appearing in the application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0056] At present, when the underwater vehicle occurs unexpected situations such as stuck rudder, water inlet, and deep drop, it is necessary to quickly discharge part of the stored seawater in a short time to provide positive buoyancy and realize the safe floating of the underwater vehicle.

[0057] Currently, the underwater vehicle mainly adopts compressed air drainage device or high-temperature gas drainage device. The compressed air drainage device is to pre-compress and store air in a high-pressure air bottle, and when needed, open the valve on the connecting pipeline between the air bottle and the water storage tank, and introduce high-pressure air into the water tank to drain the internal seawater. The high-temperature gas drainage device is to seal the solid agent in the gas generator, and when needed, ignite the agent by electrical signal to make the agent react to form high-temperature gas, which is injected into the water tank to drain the internal seawater.

[0058] With the increasing working depth of the underwater vehicle, the compressed air drainage is greatly affected by back pressure, and the drainage capacity decreases significantly. The carbon monoxide and hydrogen gas generated by the high-temperature gas drainage has the risk of secondary combustion, which is also not conducive to safety.

[0059] Although the current drainage system can use compressed air, the pressure provided by the compressed air is limited, and the pressure decreases continuously during use, thereby limiting the drainage capacity.

[0060] Therefore, the application provides a safe and efficient drainage system with adjustable drainage capacity, which can provide new protection for the navigation safety of the underwater vehicle.

[0061] In a first aspect, with reference to Figure 1 The embodiment of the application provides an internal compressed air and carbon dioxide linkage drainage system, which comprises a drainage device 1, a ballast water tank 2, a first connecting pipeline 3 and a control unit 4. The drainage device 1 comprises a first power unit 11, a second power unit 12 and a pressure reduction unit 13. The first power unit 11 is provided with a first storage chamber for storing liquid carbon dioxide. The second power unit 12 is provided with a second storage chamber for storing high-pressure air. The pressure reduction unit 13 is provided with a pressure reduction chamber. The first storage chamber and the second storage chamber are selectively communicated with the pressure reduction chamber. The ballast water tank 2 has a third storage chamber for containing water, which is selectively communicated with the pressure reduction chamber. The first connecting pipeline 3 is connected with the second power unit 12 and the pressure reduction unit 13, and is provided with a first on-off valve 31. The control unit 4 is in communication connection with the first power unit 11, and the first power unit 11 is adapted to convert the liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit 4 and enter the third storage chamber after pressure reduction by the pressure reduction chamber. The control unit 4 is in communication connection with the first on-off valve 31 to selectively communicate the second storage chamber and the pressure reduction chamber through the first connecting pipeline 3.

[0062] The drainage system provided by the embodiments of the present application, the second storage chamber of the second power unit 12 stores high-pressure air, when the ballast tank 2 needs to be drained, the control unit 4 controls the first on-off valve 31 to communicate 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 connecting pipeline 3, the high-pressure air expands in the decompression chamber, and then is discharged to the ballast tank 2 for drainage.

[0063] Carbon dioxide is in a liquid state under certain pressure and temperature, has a large density, and is convenient to store. The liquid carbon dioxide can be quickly converted into a supercritical state by increasing temperature and pressure, has a volume expansion of several times, has strong instantaneous power, and is non-toxic and non-polluting, and is a new type of drainage technology. After the liquid carbon dioxide in the first storage chamber is converted into supercritical carbon dioxide, the volume expands greatly, and the drainage is achieved by using the liquid carbon dioxide to absorb heat and convert into high-pressure supercritical carbon dioxide to expand and do work, so that the drainage capacity is strong and safe and reliable.

[0064] Specifically, the amount of air entering the ballast tank 2 from the decompression unit 13 can be selectively controlled by opening and closing of the first on-off valve 31. Alternatively, the first on-off valve 31 can adjust the size of the valve port, so as to adjust the speed of air entering the ballast tank 2 from the decompression unit 13, thereby improving the stability of the drainage system 200.

[0065] When the ballast tank 2 needs to be drained at a large flow rate, the control unit 4 controls the first on-off valve 31 to open, the high-pressure air in the second storage chamber is discharged to the ballast tank 2 through the first connecting pipeline 3 for drainage, and the liquid carbon dioxide in the first storage chamber is converted into supercritical carbon dioxide, discharged to the decompression chamber, expanded in the decompression chamber, and then enters the ballast tank 2 for drainage. The large flow rate drainage in the ballast tank 2 is achieved by using the phase change of high-pressure air and liquid carbon dioxide at the same time.

[0066] The drainage system of the embodiments of the present application combines the liquid carbon dioxide phase change technology drainage and the compressed air drainage, can independently drain by adjusting the first power unit 11 and the second power unit 12 or jointly drain, adjusts the drainage capacity of the device, and achieves the goal of adjusting the drainage capacity according to the working condition requirement. The liquid carbon dioxide and the compressed air working medium used in the present application have extremely low cost, can be used again after being filled, and have low maintenance and protection cost.

[0067] Alternatively, with reference to Figure 1 The second power unit 12 includes a plurality of compressed air bottles 121, and the second storage chamber includes a plurality of second sub-storage chambers, each of the compressed air bottles 121 has a second sub-storage chamber; each of the compressed air bottles 121 is connected with the first connecting pipeline 3 through a second connecting pipeline 5, each of the second connecting pipelines 5 is provided with a second on-off valve, and each of the second on-off valves is in communication connection with the control unit 4.

[0068] Each second sub-storage chamber corresponding to the compressed air bottle 121 is connected with the second connecting pipeline 5, and a second on-off valve is arranged 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 condition requirements, so as to control the communication of different numbers of second sub-storage chambers with the first connecting pipeline 3, thereby realizing the requirement of different drainage flow rates.

[0069] Optionally, referring to Figure 2 , a plurality of first heating portions 122 are arranged on the inner wall of the compressed air bottle 121, the first heating portions 122 extend along the axial direction of the compressed air bottle 121, and the plurality of first heating portions 122 are arranged at intervals along the circumferential direction of the compressed air bottle 121. The first heating portions 122 are in communication connection with the control unit 4.

[0070] Since the pressure in the second sub-storage chamber gradually decreases as the air in the second sub-storage chamber is discharged, the first heating portions 122 are arranged on the inner wall of the compressed air bottle 121. The first heating portions 122 can be PTC heating sheets. When the pressure in the compressed air bottle 121 is lower than a predetermined value, the control unit 4 controls the first heating portions 122 to heat the air in the compressed air bottle 121, thereby increasing the air pressure and improving the drainage capacity.

[0071] In one specific embodiment, a pressure monitoring unit is arranged at the outlet of the compressed air bottle 121. When the pressure monitoring unit detects that the pressure in the compressed air bottle 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 portions 122 to heat the air in the compressed air bottle 121, thereby increasing the air pressure and improving the drainage capacity.

[0072] Optionally, referring to Figure 2 , a heat preservation layer 123 is arranged on the inner wall surface of the compressed air bottle 121 and / or the outer wall surface of the compressed air bottle 121. The heat preservation layer 123 is arranged on the inner wall surface or the outer wall surface of the compressed air bottle 121, or the heat preservation layer 123 is arranged on both the inner wall surface and the outer wall surface of the compressed air bottle 121, thereby reducing the temperature loss in the second sub-storage chamber and improving the heat utilization efficiency in the second sub-storage chamber.

[0073] Optionally, referring to Figure 3 , the compressed air bottle 121 has a polygonal cross section in the axial direction, and the outer circumferential wall surfaces of any two adjacent compressed air bottles 121 are in surface contact. The outer circumferential wall surfaces of any two adjacent compressed air bottles 121 are in surface contact, thereby reducing the gap between the two adjacent compressed air bottles 121 and reducing the space occupied by the compressed air bottles 121. In one specific embodiment, the projection of the compressed air bottle 121 in the axial direction can be configured as a regular hexagon, and the outer circumferential wall surfaces of any two adjacent compressed air bottles 121 are in surface contact, thereby reducing the space occupied by the second power unit 12.

[0074] It should be understood that, along the axial direction of the compressed air bottle 121, the inner wall projection of the compressed air bottle 121 can be circular to ensure the pressure-bearing capacity of the compressed air bottle 121, and the outer wall projection of the compressed air bottle 121 can be a regular hexagon to reduce the space occupied by the plurality of compressed air bottles 121.

[0075] Optionally, referring to Figure 1 , the third connecting pipeline 6 is connected between the pressure relief unit 13 and the ballast tank 2, and the third connecting pipeline 6 is provided with a check valve 7. The third connecting pipeline 6 is connected between the pressure relief unit 13 and the ballast tank 2 to discharge the gas in the pressure relief chamber to the ballast tank 2, wherein the check valve 7 can reduce the backflow of the gas into the ballast tank 2, and improve the stability of the ballast tank 2 in discharging water.

[0076] Optionally, referring to Figure 4 and Figure 5 , the first power unit 11 has a first outlet, the first storage chamber is in communication with the first outlet, the pressure relief unit 13 further has a first inlet 133 and a second outlet 134, the first inlet 133 and the second outlet 134 are both in communication with the pressure relief 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 be opened when the pressure in the first storage chamber is greater than a preset value, so as to communicate the first inlet 133 and the first outlet.

[0077] The pressure relief unit blocks the first inlet 133 and the first outlet in the normal state to prevent the liquid carbon dioxide from entering the pressure relief chamber. When the liquid carbon dioxide in the first power unit 11 is converted into supercritical carbon dioxide, the pressure in the first storage chamber of the first power unit 11 exceeds the preset value, the pressure relief unit is opened to communicate the first inlet 133 and the first outlet, and the gaseous carbon dioxide enters the pressure relief unit 13 for pressure relief.

[0078] 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 very high pressure.

[0079] The first outlet is in communication with the first storage chamber, and under some specific conditions, the liquid carbon dioxide can be converted into a supercritical state and discharged from the first outlet.

[0080] The decompression unit 13 has a decompression chamber, a first inlet 133 and a second outlet 134, both of which are in communication 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 high pressure can enter the decompression chamber from the first inlet 133, at which time the medium with high pressure can be further expanded in the decompression chamber. Then, the decompressed medium can be discharged from the second outlet 134.

[0081] The pressure relief unit is sealed between the first inlet 133 and the first outlet, and is configured to rupture when the pressure in the first storage chamber is greater than a predetermined value to communicate the first inlet 133 and the first outlet.

[0082] 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 pressure threshold, the pressure relief unit opens to communicate the first inlet 133 and the first outlet. Thus, the supercritical carbon dioxide with high pressure can enter the decompression unit 13 for decompression and then be discharged from the second outlet 134.

[0083] Optionally, a second heating portion is arranged in the first storage chamber and is in communication connection with the control unit 4. The control unit 4 controls the second heating portion to heat the liquid carbon dioxide in the first storage chamber, so that the liquid carbon dioxide is phase changed into high-pressure supercritical carbon dioxide after absorbing heat.

[0084] The second heating portion can be an excitation piece, which includes an excitation agent. The excitation piece can be in communication connection with the external control unit 4. After receiving an excitation signal from the control unit 4, the excitation agent reacts chemically to generate heat, so that the liquid carbon dioxide is phase changed into high-pressure supercritical carbon dioxide after absorbing heat.

[0085] The second heating portion can also be a PTC heating sheet, which can be in communication connection with the external control unit 4. After receiving an excitation signal from the control unit 4, heat is generated, so that the liquid carbon dioxide is phase changed into high-pressure supercritical carbon dioxide after absorbing heat.

[0086] Optionally, the decompression unit 13 includes a plurality of sub-decompression units, and the plurality of sub-decompression units are in sequence communication. Along the arrangement direction of the plurality of sub-decompression units, the two sub-decompression units at the head and tail are respectively provided with the first inlet 133 and the second outlet 134.

[0087] It can be understood that each sub-decompression unit is provided with a sub-decompression chamber, and the plurality of sub-decompression chambers collectively form the above-mentioned decompression chamber.

[0088] The plurality of sub-decompression chambers are connected in series, 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-decompression chamber after being decompressed in the previous sub-decompression chamber, so that the carbon dioxide and / or air can be fully expanded.

[0089] Optionally, referring to Figure 4 and Figure 5 , the plurality of sub-decompression units include a first decompression unit 131 and a second decompression unit 132, the decompression chambers include a first decompression chamber and a second decompression chamber, the first decompression chamber is arranged in the first decompression unit 131, the second decompression chamber is arranged in the second decompression unit 132, the first decompression unit 131 is provided with a first inlet 133, and the second decompression unit 132 is provided with a second outlet 134; along the first direction A, the first power unit 11 and the second decompression unit 132 are located on the same side of the first decompression unit 131.

[0090] The first decompression chamber and the second decompression chamber are connected in series, and along the flow direction of the carbon dioxide, the first decompression chamber is closer to the first power unit 11 than the second decompression chamber. After the decompression unit is opened, the high-pressure supercritical carbon dioxide in the first power unit 11 will first enter the first decompression chamber for decompression, then enter the second decompression chamber for decompression, and finally be discharged from the second outlet 134.

[0091] Along the first direction A, the first power unit 11 and the second decompression unit 132 are located on the same side of the first decompression unit 131. In this way, the size of the water drainage device 1 in the first direction A can be reduced, and the volume of the water drainage device 1 can be reduced, so that the volume of the water drainage device 1 is more compact. At the same time, arranging the first power unit 11 and the second decompression unit 132 on the same side of the first decompression unit 131 in the first direction A can also facilitate fixing the first power unit 11 and the second decompression unit 132 to the first decompression unit 131.

[0092] Optionally, referring to Figure 5 , the size of the first decompression unit 131 in the first direction A is smaller than the size of the first decompression unit 131 in the second direction B, the size of the first decompression unit 131 in the first direction A is smaller than the size of the first decompression unit 131 in the third direction C, along the first direction A, the projection of the second decompression unit 132 falls into the central region of the first decompression unit 131, and the first direction A, the second direction B and the third direction C are perpendicular to each other.

[0093] In other words, the first pressure-reducing unit 131 is constructed as a flat structure, and the first power unit 11 and the second pressure-reducing unit 132 are disposed on the same side of the first pressure-reducing unit 131 in the thickness direction. At the same time, the flat shape of the first pressure-reducing unit 131 reduces the space occupied in the first direction A, making it easier for the drainage device 1 to be housed in the first direction A.

[0094] According to some embodiments of this application, along the first direction A, the projection of the second pressure-reducing unit 132 falls into the central region of the first pressure-reducing unit 131. Therefore, 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 sufficiently depressurized within the first pressure-reducing unit 131 before entering the second pressure-reducing unit 132 through the first inlet 133, thereby improving the pressure reduction efficiency and effect of the high-pressure gaseous carbon dioxide or compressed air.

[0095] Optionally, refer to Figure 4 There are multiple first power units 11, arranged around the second pressure relief unit 132 along the circumference of the first pressure relief unit 131.

[0096] The drainage device 1 may include a plurality of first power units 11, which are arranged sequentially along the circumference of the first pressure reducing unit 131 and along the radial direction of the first pressure reducing unit 131.

[0097] This ensures that the high-pressure supercritical carbon dioxide discharged from each first power unit 11 can be fully depressurized within the first depressurization unit 131, thereby improving depressurization efficiency.

[0098] Optionally, refer to Figure 4 The drainage device 1 also includes a pressure plate 14. Along the first direction A, the pressure plate 14 is spaced apart from the first pressure reducing unit 131, and the first power unit 11 and the second pressure reducing unit 132 are sandwiched between the first pressure reducing unit 131 and the pressure plate 14.

[0099] The first power unit 11 can be a cylindrical structure extending along the first direction A. Similarly, the second pressure-reducing unit 132 can also be a cylindrical structure extending along the first direction A. For convenience, the first power unit 11 and the second pressure-reducing unit 132 are fixed simultaneously, and the dimensions of the first power unit 11 in the first direction A are approximately the same as the dimensions of the second pressure-reducing unit 132 in the first direction A.

[0100] By setting the pressure plate 14, the first power unit 11 and the second pressure reducing unit 132 can be clamped and fixed between the pressure plate 14 and the first pressure reducing unit 131, thereby making the drainage device 1 more robust and stable as a whole.

[0101] Optionally, refer to Figure 4The drainage device 1 also includes a pull rod 15, with both ends of the pull rod 15 connected to the first pressure reducing unit 131 and the pressure plate 14 along the first direction A.

[0102] The pull rod 15 can tighten the pressure plate 14 and the first pressure-reducing unit 131. The pull rod 15 can be constructed as a long bolt, with one end of the bolt head abutting against one of the first pressure-reducing unit 131 and the pressure plate 14. The bolt shank of the long bolt can pass through the other of the first pressure-reducing unit 131 and the pressure plate 14 and be fastened by a nut. By tightening or loosening the nut, the distance between the pressure plate 14 and the first pressure-reducing unit 131 can be changed, thereby fixing the pressure plate 14 and the first pressure-reducing unit 131, or disassembling the pressure plate 14 and the first pressure-reducing unit 131.

[0103] According to some embodiments of this application, the drainage device 1 further includes a pressure sensor 17, which is disposed in the first pressure reducing unit 131 for detecting changes in gas pressure within the first pressure reducing unit 131.

[0104] The pressure sensor 17 can monitor the pressure inside the first pressure reducing unit 131 in real time, and selectively open one or more pressure relief units to introduce one or more supercritical carbon dioxide from the first power unit 11 into the first pressure reducing unit 131; or, the pressure sensor 17 can monitor the pressure inside the first pressure reducing unit 131 in real time, and selectively open one or more second on / off valves to introduce compressed air from one or more compressed air cylinders 121 into the first pressure reducing unit 131.

[0105] According to some embodiments of this application, the drainage device 1 further includes an overpressure protection device 16, which is disposed 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 suggests, the overpressure protection device 16 can play a protective role, reducing the probability of damage to the first pressure reducing unit 131 and the second pressure reducing unit 132 due to excessive pressure in the first pressure reducing unit 131.

[0106] When the carbon dioxide and / or air pressure in the first pressure reducing unit 131 exceeds the design safety value, the overpressure protection device 16 can automatically open and release carbon dioxide to reduce the pressure, thereby protecting the structural safety of the first pressure reducing unit 131 and the second pressure reducing unit 132.

[0107] In some embodiments of this application, a rectifier is provided inside the second pressure-reducing chamber. The rectifier can regulate the flow of carbon dioxide and / or air within the second pressure-reducing chamber, allowing the carbon dioxide and / or air to be discharged from the second outlet 134 at a relatively gentle pressure. Of course, the rectifier can also further agitate the carbon dioxide, thereby improving the pressure reduction efficiency.

[0108] Optionally, the rectifier can be disposed on the inner wall of the second pressure-reducing unit 132, and the rectifier can be constructed as a protrusion extending 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, including adjacent first and second inner wall regions. The first inner wall region is closer to the first pressure-reducing unit 131 than the second inner wall region, and the density of rectifiers in the first inner wall region is greater than the density of rectifiers in the second inner wall region. That is, the number of rectifiers per unit area in the first inner wall region is greater than the number of rectifiers per unit area in the second inner wall region. This allows for a more uniform carbon dioxide pressure.

[0109] In one alternative embodiment, reference Figure 6 The drainage device 1 also includes a gas recovery device 8, which comprises a gas-liquid separation assembly 81, a gas capture assembly 82, a recovery chamber 83, a cooling assembly 84, a compression assembly 85, and a storage assembly. The gas-liquid separation assembly 81 is located between the ballast water tank 2 and the drain outlet. The gas capture assembly 82 communicates with the chamber of the gas-liquid separation assembly 81. The recovery chamber 83 communicates with the gas capture assembly 82. The cooling assembly 84 is located inside the recovery chamber 83. The compression assembly 85 is located at the outlet of the recovery chamber 83. The storage assembly can be a high-pressure storage tank for collecting and storing gas.

[0110] Specifically, a gas-liquid separation assembly 81 is installed between the ballast water tank 2 and the drain outlet. The gas-liquid separation assembly 81 is connected to a gas capture assembly 82. The gas capture assembly 82 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 81. The liquid sinks due to gravity and is discharged from the bottom, while the gas is collected by the gas capture assembly 82.

[0111] The gas collected by the gas capture component 82 enters the recovery chamber 83. The cooling component 84 is located in the recovery chamber 83. The cooling component 84 can be a cooling coil or a cooling fan to cool the high-temperature gas. The compression component 85 can be a compression pump or a compressor to compress the gas drained from the recovery chamber 83, thereby collecting the compressed gas in the storage component.

[0112] The storage component can be a first power unit 11 and a second power unit 12. The compression component 85 is connected to the first power unit 11 and the second power unit 12. A valve is set between the compression component 85 and 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, thereby collecting the gas recovered in the gas recovery device 8 into the power unit, thus realizing the reuse of gas, reducing operating costs, and reducing carbon dioxide emissions, thereby reducing the impact of carbon dioxide on the marine ecosystem.

[0113] In another optional embodiment, considering energy recovery and utilization, a heat recovery component is provided inside the rectifier. This component includes a shell-and-tube, plate, or finned heat exchanger, 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, its temperature rises, and the heat is transferred to the heat storage section. The heat storage section stores the recovered heat energy through a phase change material 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 underwater vehicle's endurance.

[0114] Secondly, this application also provides an underwater vehicle including the drainage system described in any of the above embodiments.

[0115] Because the underwater vehicle according to the embodiments of this application is equipped with the aforementioned drainage system, the drainage capacity can be adjusted by changing the amount of liquid carbon dioxide or compressed air emitted as needed. This achieves the goal of adjusting the drainage capacity according to operating conditions, thereby enabling the underwater vehicle to adapt to more scenarios, offering flexible usage strategies, and greatly enhancing its drainage capacity and usability. Furthermore, it can be used for the modification and upgrading of various vehicles.

[0116] 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.

[0117] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. 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.

[0118] The above description is merely an embodiment of this application and is not intended to limit 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 principle of this application should be included within the scope of the claims of this application.

[0119] 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. A built-in compressed air and carbon dioxide linkage drainage system, characterized by, The application relates to a drainage device, which comprises 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, the first storage chamber and the second storage chamber are selectively communicated with the pressure reduction chamber, a ballast water tank has a third storage chamber for containing water, the third storage chamber is selectively communicated with the pressure reduction chamber, a first connecting pipeline is connected with the second power unit and the pressure reduction unit, a first on-off valve is arranged on the first connecting pipeline, a control unit is in communication connection with the first power unit, the first power unit is adapted to transform liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit and make the high-pressure supercritical carbon dioxide enter the third storage chamber after being reduced in pressure by the pressure reduction chamber, the control unit is in communication connection with the first on-off valve so that the first connecting pipeline selectively communicates the second storage chamber and the pressure reduction chamber. The second power unit comprises a plurality of compressed air bottles, the second storage chamber comprises a plurality of second sub-storage chambers, each of the compressed air bottles has the second sub-storage chamber; Each of the compressed air bottles is connected with the first connecting pipeline through a second connecting pipeline, a second on-off valve is arranged on each of the second connecting pipelines, and each of the second on-off valves is in communication connection with the control unit. A plurality of first heating parts are arranged 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 a plurality of the first heating parts are arranged at intervals along the circumferential direction of the compressed air bottle, and the first heating parts are in communication connection with the control unit. The inner wall surface of the compressed air bottle and / or the outer wall surface of the compressed air bottle is provided with a heat preservation layer.

2. The drainage system of claim 1, wherein, The cross section of the compressed air bottle in the axial direction is in a polygonal structure, and the outer wall surfaces of any two adjacent compressed air bottles are in surface contact. A third connecting pipeline is connected between the pressure reduction unit and the ballast water tank, and a check valve is arranged on the third connecting pipeline.

3. The drainage system of claim 2, wherein, The first power unit has a first outlet, the first storage chamber is communicated with the first outlet, the pressure reduction unit further has a first inlet and a second outlet, the first inlet and the second outlet are both communicated with the pressure reduction chamber, and the second outlet is connected with the third connecting pipeline.

4. The drainage system of claim 3, wherein, The first power unit further comprises 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 be opened when the pressure in the first storage chamber is greater than a preset value so as to communicate the first inlet with the first outlet.

5. The drainage system of claim 3, wherein, A second heating part is arranged in the first storage chamber, and the second heating part is in communication connection with the control unit.

6. The drainage system of claim 1, wherein, ​ 7. The drainage system of claim 6, wherein, ​ ​ 8. The drainage system of claim 7, wherein, ​ 9. The drainage system of claim 7, wherein, The pressure reduction unit comprises a plurality of sub-pressure reduction units, the plurality of sub-pressure reduction units are sequentially communicated, and two sub-pressure reduction units at the two ends along the arrangement direction of the plurality of sub-pressure reduction units are respectively provided with the first inlet and the second outlet.

10. The drainage system of claim 9, wherein, The plurality of sub-pressure reduction units comprises a first pressure reduction unit and a second pressure reduction unit, the pressure reduction chamber comprises a first pressure reduction chamber and a second pressure reduction chamber, the first pressure reduction chamber is arranged in the first pressure reduction unit, the second pressure reduction chamber is arranged in the second pressure reduction unit, the first pressure reduction unit is provided with the first inlet, and the second pressure reduction unit is provided with the second outlet. Along the first direction, the first power unit and the second pressure reduction unit are located on the same side of the first pressure reduction unit.

11. The drainage system of claim 10, wherein, The size of the first pressure reduction unit in the first direction is smaller than the size of the first pressure reduction unit in the second direction, the size of the first pressure reduction unit in the first direction is smaller than the size of the first pressure reduction unit in the third direction, along the first direction, the projection of the second pressure reduction unit falls into the central region of the first pressure reduction unit, and the first direction, the second direction and the third direction are perpendicular to each other.

12. The drainage system of claim 11, wherein, The first power unit is a plurality of, along the circumference of the first pressure reduction unit, a plurality of first power units are arranged around the second pressure reduction unit.

13. The drainage system of claim 10, wherein, The drainage device further comprises a pressing plate, along the first direction, the pressing plate is arranged at intervals with the first pressure reduction unit, and the first power unit and the second pressure reduction unit are clamped between the first pressure reduction unit and the pressing plate.

14. The drainage system of claim 13, wherein, The drainage device further comprises a pull rod, along the first direction, the two ends of the pull rod are respectively connected with the first pressure reduction unit and the pressing plate.

15. A vehicle characterized by, The drainage system comprises any one of claims 1-14. The drainage system comprises any one of claims 1-14.

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