A phase change aerodynamic working device and a working method

Abstract

The application discloses a phase change pneumatic working device and a working method, which comprise a heat supply mixed phase changer, a first pipeline, a second pipeline, a parallel pipeline composed of an extrusion gas source supply branch and a phase change medium supply branch, one end of the first pipeline is communicated with the parallel pipeline, the other end of the first pipeline is communicated with the heat supply mixed phase changer, the heat supply mixed phase changer is provided with an expansion working pipeline away from the one end of the first pipeline, one end of the second pipeline is communicated with the parallel pipeline, and the other end of the second pipeline is an air inlet. The extrusion gas source supply branch of the application can inject air into the mixed chamber of the heat supply mixed phase changer at the beginning of work, discharge the initial water in the mixed chamber, form a larger buffer gas chamber in the chamber, facilitate the subsequent blowing process, and effectively help the initial air to form an initial air cushion in the water tank, so that the blowing efficiency of the phase change power device in the early stage is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of underwater equipment technology, and in particular to a phase change aerodynamic power-generating device and power-generating method. Background Technology

[0002] Blow-out technology is primarily used to quickly remove seawater from the ballast tanks of submersibles and marine engineering equipment for emergency or rapid ascent. Existing technologies mainly employ high-pressure gas blow-out, requiring pressures significantly higher than the external pressure. However, the efficiency drops drastically at deep dives (>500m) due to pressure and temperature drops during the exhaust process from the gas tank. Using fuel gas blow-out can alleviate these problems; however, the extremely high temperature of the fuel gas (>1500℃) and the mixing of unburned fuel gas with air can trigger secondary deflagration, especially when the oxygen concentration in the confined environment of the submersible's ballast tanks is high. Furthermore, seawater from the ballast tanks may flow back into the blow-out device through pipelines, hindering its operation and reducing efficiency. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention proposes a phase change pneumatic power device adaptable to wide sea depths. It can perform pre-drainage treatment, meet different blowing media discharge requirements, thereby achieving the required drainage rate and volume. It also has the advantages of compact structure, stable process flow, and multiple uses.

[0004] The technical solution of the present invention: A phase change pneumatic power-generating device includes a heating and mixing phase changer, a first pipeline, a second pipeline, and a parallel pipeline composed of a compressed air supply branch and a phase change medium supply branch. One end of the first pipeline is connected to the parallel pipeline, and the other end of the first pipeline is connected to the heating and mixing phase changer. An expansion power-generating pipeline is provided at the end of the heating and mixing phase changer away from the first pipeline. One end of the second pipeline is connected to the parallel pipeline, and the other end of the second pipeline is an air inlet.

[0005] In one embodiment, the extrusion gas supply branch includes a first shut-off valve, an extrusion gas storage chamber, and a second shut-off valve connected in sequence; the phase change medium supply branch includes a third shut-off valve, a pressure reducing valve, a phase change medium storage chamber, a flow regulator, and a fourth shut-off valve connected in sequence; and a fifth shut-off valve is provided on the second pipeline.

[0006] Preferably, the phase change medium stored in the phase change medium storage chamber is a substance that can undergo phase change, vaporization, and expansion upon heating, such as liquid carbon dioxide or liquid nitrogen. The phase change medium storage chamber is generally in the form of a pressure vessel; for lightweight design, a titanium alloy inner liner wound with composite material is recommended. The storage chamber has an inlet and an outlet. Air enters the container and pushes the internal phase change medium out through the outlet.

[0007] Preferably, the substance stored in the compressed air source storage chamber is common air, and the purpose of setting up this device is to discharge the seawater in the heating mixing phase changer in advance.

[0008] Preferably, the air inlet of the second pipeline is connected to the air system inside the submersible, which can provide compressed air to the phase change medium storage chamber or fill the compressed air source storage chamber.

[0009] In one embodiment, the phase change medium supply branch is provided with a phase change medium filling pipeline, and the phase change medium filling pipeline is provided with a sixth shut-off valve.

[0010] In one embodiment, the heating hybrid phase changer includes multiple heating units, a mixing chamber, and a medium pipeline. The mixing chamber includes an inner cavity and an outer wall, with a gas flow channel formed between the inner cavity and the outer wall. Each heating unit is provided with a high-temperature gas nozzle, which communicates with the inner cavity of the mixing chamber. One end of the medium pipeline is connected to the first pipeline, and the other end of the medium pipeline is located in the inner cavity of the mixing chamber. The gas flow channel is connected to the expansion work pipeline.

[0011] In one embodiment, the heating unit includes a metal sleeve and nozzle heads and an ignition unit disposed at both ends of the metal sleeve. The metal sleeve contains a heating agent and an ignition device. The nozzle head has a pressure relief chamber, a pressure relief plate, and a nozzle. The nozzle is connected to the high-temperature gas nozzle. The pressure relief chamber is connected to the metal sleeve. The pressure relief plate is disposed between the pressure relief chamber and the nozzle. The ignition unit has an ignition connector, a agent holder, and a gas inlet. The metal sleeve is mounted on the agent holder. The ignition connector is electrically connected to the ignition device. The gas inlet is connected to the metal sleeve. The heating unit contains a combustible heating agent. Upon receiving a signal from the ignition connector, the ignition device ignites the agent at its ignition point. The heating agent undergoes a combustion reaction, generating high-heat gas in the pressure relief chamber. This causes the pressure inside the pressure relief chamber to gradually increase. When the pressure exceeds the pressure relief plate's opening pressure, the pressure relief plate opens, injecting the high-temperature gas into the mixing chamber. The phase change medium flowing out of the phase change medium storage chamber enters the mixing chamber and mixes with the hot gas released by the heating unit, thereby causing phase change expansion. The gas then flows through the gas channel and is ejected from the expansion work pipeline for purging.

[0012] In one embodiment, the inner diameter of the pressure relief chamber gradually decreases from the metal sleeve towards the nozzle. When the heating agent inside the metal sleeve undergoes a combustion reaction, a large amount of high-temperature gas is released. The gradually decreasing inner diameter of the pressure relief chamber increases the pressure at the outlet, allowing the high-temperature gas to break through the pressure relief plate and ultimately enter the mixing chamber to exchange heat with the phase change medium. This causes the phase change medium to expand due to phase change, and the gas is then ejected from the expansion work pipe through the gas flow channel for purging.

[0013] In one embodiment, the outer wall of the metal sleeve and the outer wall of the pressure relief cavity are provided with a heat-resistant layer.

[0014] In one embodiment, the outlet of the expansion working pipe is equipped with a flow rectifier. The flow rectifier includes a housing, a first type of baffle, and a second type of baffle. The first type of baffle is located directly in front of the expansion working pipe, and the second type of baffle is alternately distributed on both sides of the first type of baffle, so that the airflow ejected from the expansion working pipe forms a Z-shaped flow channel inside the housing. The housing has several exhaust holes around its perimeter. The flow rectifier is an effective device for slowing down and guiding the flow direction of the ejected airflow. Its main function is to slow down the airflow as much as possible near the exhaust holes, thereby reducing the agitation of the seawater in the water tank and reducing heat exchange.

[0015] Based on the same inventive concept, this invention also proposes a method for performing work using the above-mentioned phase change aerodynamic work device, comprising the following steps:

[0016] S1. Connect the compressed air supply branch to the heating mixing phase changer, discharge the seawater in the heating mixing phase changer, and after the set time is reached, disconnect the compressed air supply branch from the heating mixing phase changer.

[0017] S2. Connect the second pipeline to the phase change medium supply branch, allowing air to enter the phase change medium supply branch and pressurize it to reach the set pressure;

[0018] S3. Connect the phase change medium supply branch to the heating mixing phase changer, and the liquid medium enters the heating mixing phase changer through the pipeline;

[0019] S4. The heating mixing phase changer starts heating. The liquid medium is heated and phase-changes into a gaseous medium inside the heating mixing phase changer. The gaseous medium, after being heated and phase-change expanded, is sprayed out from the expansion work pipe for purging.

[0020] S5. After the set blowing amount is reached, the heating mixing phase changer stops heating and the phase change medium is continuously injected into the heating mixing phase changer for cooling.

[0021] S6. Disconnect the pipeline and complete the purging process.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The compressed air supply branch can be inflated using a conventional air source. Its main function is to inject air into the mixing chamber of the heating and mixing phase changer at the beginning of operation, causing most of the water in the mixing chamber to be discharged, creating a larger buffer gas chamber inside the chamber, which facilitates the subsequent purging process. At the same time, the initial air can effectively help form an initial air cushion in the water tank, which can effectively improve the purging efficiency of the purging device in the early stage.

[0024] 2. It can meet different purging working fluid discharge requirements, thereby achieving the required drainage rate and drainage volume.

[0025] 3. It also has the advantages of compact structure, stable process flow, and multiple uses. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the heating hybrid phase changer in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the heating unit structure in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the mixing chamber of the heating hybrid phase changer in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the rectifier device structure in an embodiment of the present invention;

[0031] Figure 6 for Figure 4 The diagram shows the process by which gas in the mixing chamber is compressed and discharged from the gas source storage chamber into seawater; where... Figure 6 (a) is a schematic diagram of the seawater in the mixing chamber before the initial compressed air enters; Figure 6 (b) is a schematic diagram showing the initial compression of air into the mixing chamber to expel seawater. Figure 6 (c) is a schematic diagram showing the complete discharge of seawater from the mixing chamber;

[0032] Figure 7 This is a flowchart illustrating the blowing operation of the blowing device in an embodiment of the present invention.

[0033] In the diagram, 1. Heating mixing phase changer; 2. First pipeline; 3. Second pipeline; 4. Extruded gas supply branch; 5. Phase change medium supply branch; 6. Expansion power pipeline; 7. Fifth shut-off valve; 8. Submarine air system; 9. System controller; 10. Phase change medium filling pipeline; 11. Sixth shut-off valve; 12. Heating unit; 13. Mixing chamber; 14. Medium pipeline; 15. High-temperature gas nozzle; 16. Rectifier; 401. First shut-off valve; 402. Extruded gas storage chamber; 403. Second shut-off valve; 501. Inlet pipeline; 502. Outlet pipeline; 503. Third shut-off valve; 504. Pressure reducing valve; 505. Phase change medium. 506. Flow regulator; 507. Fourth shut-off valve; 1201. Metal sleeve; 1202. Heating agent; 1203. Ignition device; 1204. Pressure relief chamber; 1205. Pressure relief plate; 1206. Nozzle; 1207. Pressure relief plate pressure ring; 1208. Activation connector; 1209. Agent holder; 1210. Gas inlet; 1211. Heat-resistant layer; 1212. Sealing ring; 1301. Inner cavity; 1302. Outer wall; 1303. Gas flow channel; 1601. Outer shell; 1602. First type baffle; 1603. Second type baffle; 1604. First side; 1605. Second side; 1606. Exhaust port. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] 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 invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figure 1As shown, this embodiment discloses a phase change pneumatic power-generating device, including a heating and mixing phase changer 1, a first pipeline 2, a second pipeline 3, and a parallel pipeline composed of a compressed air supply branch 4 and a phase change medium supply branch 5. One end of the first pipeline 2 is connected to the parallel pipeline, and the other end of the first pipeline 2 is connected to the heating and mixing phase changer 1. An expansion power-generating pipeline 6 is provided at the end of the heating and mixing phase changer 1 away from the first pipeline 2. One end of the second pipeline 3 is connected to the parallel pipeline, and the other end of the second pipeline 3 is an air inlet connected to the submersible air system 8. A fifth shut-off valve 7 is provided on the pipeline connecting the second pipeline 3 to the submersible air system 8.

[0037] The submersible air system 8 can supply compressed air to the phase change medium storage chamber 505, and can also fill the compressed air source storage chamber 402 with air.

[0038] In this embodiment, the compressed air supply branch 4 includes a first shut-off valve 401, a compressed air storage chamber 402, and a second shut-off valve 403 connected in sequence. The compressed air storage chamber 402 is an air source independent of the submersible's air system 8. It can be inflated using a conventional air source or the submersible's internal air system. Its main function is to inject air into the mixing chamber 13 of the heating and mixing phase changer 1 at the very beginning of operation, causing most of the water in the mixing chamber 13 to be discharged, creating a larger buffer gas chamber inside the chamber. This facilitates the subsequent purging process. At the same time, the initial air can effectively help form an initial air cushion inside the water tank, which can effectively improve the efficiency in the early stage of purging.

[0039] In this embodiment, the phase change medium supply branch 5 includes a third shut-off valve 503, a pressure reducing valve 504, a phase change medium storage chamber 505, a flow regulator 506, and a fourth shut-off valve 507 connected in sequence. The top of the phase change medium storage chamber 505 is provided with an inlet pipe 501, and the bottom of the phase change medium storage chamber 505 is provided with an outlet pipe 502. The third shut-off valve 503 and the pressure reducing valve 504 are installed in the inlet pipe 501, and the flow regulator 506 and the fourth shut-off valve 507 are installed in the outlet pipe 502.

[0040] The phase change medium storage chamber 505 stores high-density liquid CO2, with a density ranging from 750 kg / m³ to 900 kg / m³. At 5°C, the pressure in a storage chamber with a density of 900 kg / m³ is only 4.2 MPa, while compressed air stored at this density would reach a pressure of 320 MPa. Currently used air cylinders have a maximum pressure of 70 MPa and can store air with a density of 555 kg / m³ at 278 K, indicating that the working medium used in this system has a high-density characteristic during storage.

[0041] The top of the phase change medium storage chamber 505 is equipped with a high-pressure air inlet. The inlet pipe 501 is equipped with a third shut-off valve 503 and a pressure reducing valve 504. The pressure reducing valve 504 can automatically adjust and reduce the pressure of the high-pressure air source to the pressure required to compress CO2. The third shut-off valve 503 is electrically or pneumatically operated. Both valves are remotely controlled by the system controller 9. The bottom of the phase change medium storage chamber 505 is equipped with a CO2 outlet. When the storage chamber itself or is pressurized by high-pressure air, CO2 flows out through the outlet pipe 502. The outlet pipe 502 is equipped with a flow regulator 506 and a fourth shut-off valve 507. The flow rate is determined by adjusting the size of the through hole in the flow regulator 506 to change the pipe resistance.

[0042] The phase change medium storage chamber 505 stores the CO2 working medium used for purging. The phase change medium storage chamber is generally in the form of a pressure vessel, and its lightweight design utilizes a titanium alloy inner liner wound with composite material. Alternatively, liquid nitrogen can also be selected as the phase change medium.

[0043] The pressure reducing valve 504A can regulate the pressure of the compressed air entering the phase change medium storage chamber to the target value. The pressure reducing valve adopts the form of "dome-loaded pressure reducing valve + low-pressure electro-proportional valve", which can combine control accuracy and cost.

[0044] Among them, the flow regulator 506 adopts a stepper motor to control the needle valve, which can steplessly adjust the valve flow orifice diameter, thereby realizing the flow regulation.

[0045] In this embodiment, the phase change medium supply branch 5 is equipped with a phase change medium filling pipeline 10, which is used to fill the phase change medium storage chamber 505 with CO2. It can also be used to inject CO2 into the operating chamber to achieve fire extinguishing. The phase change medium filling pipeline 10 is equipped with a sixth shut-off valve 11.

[0046] The purging device is equipped with a system controller 9, which is electrically connected to the first shut-off valve 401, the second shut-off valve 403, the third shut-off valve 503, the fourth shut-off valve 507, the fifth shut-off valve 7, the sixth shut-off valve 11, the pressure reducing valve 504, the flow regulator 506, and the heating mixing phase changer 1 via control lines. By adjusting the CO2 flow supply and the hot gas supply of the heating unit, it flexibly meets different purging working fluid discharge requirements, thereby achieving the required drainage rate and drainage volume. It also features a compact structure, stable process flow, and the ability to be used in multiple applications.

[0047] like Figure 2As shown, in this embodiment, the heating hybrid phase changer 1 includes multiple heating units 12, a mixing chamber 13, and a medium pipeline 14. The mixing chamber 13 includes an inner cavity 1301 and an outer wall 1302. A gas flow channel 1303 is formed between the inner cavity 1301 and the outer wall 1302. The gas flow channel 1303 is connected to the expansion work pipeline 6. Each heating unit 12 is provided with a high-temperature gas nozzle 15, which is connected to the inner cavity 1301 of the mixing chamber 13. One end of the medium pipeline 14 is connected to the first pipeline 2, and the other end of the medium pipeline 14 is located in the inner cavity 1301 of the mixing chamber 13.

[0048] like Figures 3-4 As shown, in this embodiment, the heating unit 12 includes a metal sleeve 1201 and nozzle heads and an activation unit disposed at both ends of the metal sleeve 1201. The metal sleeve 1201 contains a heating agent 1202 and an ignition device 1203. The nozzle head is provided with a pressure relief chamber 1204, a pressure relief plate 1205, and a nozzle 1206. The nozzle 1206 is connected to a high-temperature gas nozzle 15. The pressure relief chamber 1204 is connected to the metal sleeve 1201. The pressure relief plate 1205 is pressed between the pressure relief chamber 1204 and the nozzle 1206 by a pressure relief plate pressure ring 1207. The activation unit is provided with an activation connector 1208, an agent holder 1209, and an air inlet 1210. The activation connector 1208 is controlled by the system controller 9 and is electrically connected to the ignition device 1203. The metal sleeve 1201 is installed on the agent holder 1209, and the air inlet 1210 is connected to the metal sleeve 1201.

[0049] Working principle of the heating unit: The heating unit 12 contains a combustible heating agent 1202. Upon receiving a signal from the ignition connector 1208, the ignition device 1203 ignites the agent at the ignition point, causing the heating agent 1202 to undergo a combustion reaction. This generates high-heat gas in the pressure relief chamber 1204, gradually increasing the pressure inside. When the pressure exceeds the opening pressure of the pressure relief plate 1205, the pressure relief plate 1205 opens, injecting the high-temperature gas into the mixing chamber 13. The phase change medium flowing out of the phase change medium storage chamber 505 enters the mixing chamber 13 and mixes with the hot gas released by the heating unit 12, resulting in phase change expansion. The gas then flows through the gas channel 1303 and is ejected from the expansion work pipe 6 for purging.

[0050] The working pressure of the heating unit 12 will have a brief pulse high pressure after ignition, not exceeding 25MPa, and then the continuous working pressure will not exceed 20MPa, with a continuous working time of about 10s. Through the design of the calorific value of the heating agent 1202, the internal temperature during the combustion process will not exceed 1800 K.

[0051] The heating unit 12 is initially filled with an inert gas (CO2 or nitrogen is recommended) at a certain pressure, which is introduced through the gas inlet 1210. This ensures that there is confining pressure inside the unit during any operating process, increasing the ability of the heating unit 12 shell and the pressure relief plate 1205 to resist external pressure. It also increases the initial combustion rate of the reagent, resulting in a higher pressure rise rate and a rapid response after ignition to open the pressure relief plate 1205 for output. This device is reusable; if some heating units remain after a purging cycle, they can still be used for the next purging cycle.

[0052] When the heating agent 1202 is ignited, it can generate a large amount of gas and release heat, with CO2 being the main component of the product. The heating agent 1202 is wrapped with a heat insulation layer and installed in a metal sleeve 1201. The outer wall of the metal sleeve 1201 and the outer wall of the pressure relief cavity are provided with a heat-resistant layer 1211.

[0053] To prevent the nozzle head structure from being softened by the impact of high-temperature gas, the pressure relief chamber 1204 is fitted with a heat-resistant layer 1211, and the pressure relief plate 1205 pressure ring is also made of heat-resistant metal. A sealing ring 1212 is provided around the pressure relief plate pressure ring 1207.

[0054] In this embodiment, the inner diameter of the pressure relief chamber 1204 gradually decreases from the metal sleeve 1201 toward the nozzle 1206. When the heating agent 1202 in the metal sleeve 1201 undergoes a combustion reaction, a large amount of high-temperature gas is released. The pressure relief chamber 1204 with its gradually decreasing inner diameter can increase the pressure at the outlet of the pressure relief chamber 1204, allowing the high-temperature gas to break through the pressure relief plate 1205 and finally enter the mixing chamber 13 to exchange heat with the phase change medium, causing the phase change medium to undergo phase change expansion. The gas then passes through the gas flow channel 1303 and is ejected from the expansion work pipeline 6 for purging.

[0055] like Figure 5 As shown, in this embodiment, the outlet of the expansion working pipe 6 is equipped with a rectifier 16, which includes a housing 1601, a first type of baffle 1602, and a second type of baffle 1603. The material of the rectifier 16 should be a metal material with low heat capacity and low density, or a high-strength polymer material, but it needs to be able to withstand impact loads when the strength decreases due to high temperature. The inner wall surface of the rectifier 16 should have its surface roughness increased as much as possible to accelerate the deceleration of the airflow. Outlets are designed on each side of the rectifier 16, and the outlet size can be adjusted through experiments and simulations to achieve the optimal outlet size design.

[0056] Among them, the first type of baffle 1602 is a horizontal plate, located directly in front of the expansion working pipe 6, and the second type of baffle 1603 is a vertical plate, which is symmetrically arranged on both sides of the first type of baffle 1602, such as... Figure 5As shown, the sides of the outer shell 1601 parallel to the first type of baffle 1602 are the first side 1604 and the second side 1605. The alternating distribution means that the fixed ends of two adjacent second type of baffles 1603 are connected to the first side 1604 and the second side 1605 respectively, while the non-fixed ends of the second type of baffles 1603 are located inside the outer shell 1601 and are not connected to the sides, causing the airflow ejected from the expansion working pipe 6 to form a Z-shaped flow channel inside the outer shell 1601. Several exhaust holes 1606 are provided around the outer shell 1601. The rectifier device 16 is an effective device for slowing down and guiding the flow direction of the ejected airflow. Its main function is to slow down the airflow as much as possible near the exhaust holes, thereby reducing the agitation of the seawater in the water tank and reducing heat exchange.

[0057] When the heating mixing phase changer 1 is not in use, the mixing chamber 13 will be filled with water due to high water pressure. This is detrimental to the activation and ejection of the heating unit 12, causing a significant increase in pressure within the mixing chamber 13. Therefore, an initial compression air source is needed to quickly expel the water from this chamber. For the very small amount of seawater remaining in the mixing chamber 13, it can be atomized into droplets and discharged from the mixing chamber when the heating unit 12 burns and outputs high-temperature gas, or it can be directly evaporated. The process is described in [details omitted]. Figure 6 .

[0058] The previous solution was to design a one-way valve at the injection nozzle. However, the reliability of the one-way valve is not high. Once it leaks, the device must be stopped because the heating unit 12 will cause the pressure in the chamber to rise sharply, leading to device failure. This design effectively solves this problem.

[0059] Figure 6 (a) shows the initial state when the mixing chamber 13 is filled with seawater. Figure 6 (b) As the initial compressed air enters, it forces the seawater out of the mixing chamber 13, causing the water level to drop. Figure 6 (c) A large initial air cavity appears in the final mixing chamber 13.

[0060] like Figure 7 As shown, in this embodiment, the nozzles 1206 of multiple heating units 12 are connected to the same high-temperature gas nozzle 15. Alternatively, the nozzles 1206 of the heating unit 12 can be connected to the high-temperature gas nozzle 15 in a single correspondence. This facilitates the discharge of seawater from the mixing chamber 13 and avoids residue.

[0061] The technical solution proposed in this embodiment has the following advantages:

[0062] 1. Compared with high-pressure gas purging technology, the system volume and weight are reduced by more than 50%, and there is no problem of flow rate reduction during the purging process;

[0063] 2. Compared with gas purging technology, the process temperature drops from 2000 K to below 800 K, and the CO2 content in the process gas exceeds 90%. The concentration of the gas that will cause deflagration (CO / H2) will not exceed the explosion limit, and there is no risk of secondary deflagration.

[0064] Based on the same inventive concept, this invention also proposes a method for the system controller 9 to generate a purging strategy under emergency conditions when the submersible encounters a hazard. This strategy includes controlling the pressure of the pressure reducing valve 504, the orifice diameter of the flow regulator 506, and the ignition sequence of each heating unit 12, and issuing emergency purging commands to each part to perform purging work. The method includes the following steps:

[0065] S1. Open the second shut-off valve 403, connect the pipeline of the compressed air supply branch 4 and the heating mixing phase changer 1, the compressed air storage chamber 402 works, and basically discharges the seawater in the heating mixing phase changer 1. After the set time is reached, close the second shut-off valve 403.

[0066] S2. Open the third shut-off valve 503, pressure reducing valve 504, and fifth shut-off valve 7, and connect the second pipeline 3 with the phase change medium supply branch 5, so that the pressure in the phase change medium storage chamber 505 can be rapidly increased to the pressure required for extrusion.

[0067] S3. Open the fourth shut-off valve 507 to connect the phase change medium storage chamber 505 with the heating mixing phase changer 1 pipeline. Liquid CO2 enters the mixing chamber 13 of the heating mixing phase changer 1 through the pipeline.

[0068] S4. After the set time is reached, the heating unit 12 is ignited one by one, continuously supplying high-temperature gas to the mixing chamber 13. The liquid CO2 is heated and phase-changes into a gaseous medium in the mixing chamber 13. The gaseous medium after the phase change and expansion is sprayed out from the expansion work pipe 6 and enters the water tank for purging.

[0069] S5. After the set purging amount is reached, the ignition of the heating unit 12 is stopped, and liquid CO2 is continuously injected into the heating mixing phase changer 1 to cool the heating mixing phase changer 1.

[0070] S6. After injecting the set mass of CO2, close the fourth shut-off valve 507, cut off the outlet pipe 502 of the phase change medium storage chamber 505, and close the third shut-off valve 503 to prevent air from entering the phase change medium storage chamber 505.

[0071] S7. Blowing operation completed.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A phase change aerodynamic power-generating device, characterized in that: The device includes a heating and mixing phase changer, a first pipeline, a second pipeline, and a parallel pipeline consisting of a compressed air supply branch and a phase change medium supply branch. One end of the first pipeline is connected to the parallel pipeline, and the other end of the first pipeline is connected to the heating and mixing phase changer. The heating and mixing phase changer has an expansion and power supply pipeline at the end away from the first pipeline. One end of the second pipeline is connected to the parallel pipeline, and the other end of the second pipeline is an air inlet. The heating and mixing phase changer includes multiple heating units, a mixing chamber, and a medium pipeline. The mixing chamber includes an inner cavity and an outer wall, with a gas flow channel formed between the inner cavity and the outer wall. Each heating unit has a high-temperature gas nozzle connected to the inner cavity of the mixing chamber. One end of the medium pipeline is connected to the first pipeline, and the other end of the medium pipeline is located in the inner cavity of the mixing chamber. The gas flow channel is connected to the expansion and power supply pipeline.

2. The phase change pneumatic power-generating device according to claim 1, characterized in that: The extrusion gas supply branch includes a first shut-off valve, an extrusion gas storage chamber, and a second shut-off valve connected in sequence. The phase change medium supply branch includes a third shut-off valve, a pressure reducing valve, a phase change medium storage chamber, a flow regulator, and a fourth shut-off valve connected in sequence. A fifth shut-off valve is provided on the second pipeline.

3. The phase change pneumatic power-generating device according to claim 1, characterized in that: The phase change medium supply branch is equipped with a phase change medium filling pipeline, and the phase change medium filling pipeline is equipped with a sixth shut-off valve.

4. The phase change pneumatic power-generating device according to claim 1, characterized in that: The heating unit includes a metal sleeve and nozzle heads and an activation unit disposed at both ends of the metal sleeve. The metal sleeve contains a heating agent and an ignition device. The nozzle head is provided with a pressure relief chamber, a pressure relief plate, and a nozzle. The nozzle is connected to the high-temperature gas nozzle. The pressure relief chamber is connected to the metal sleeve. The pressure relief plate is disposed between the pressure relief chamber and the nozzle. The activation unit is provided with an activation connector, a agent holder, and an inflation port. The metal sleeve is mounted on the agent holder. The activation connector is electrically connected to the ignition device. The inflation port is connected to the metal sleeve.

5. The phase change pneumatic power-generating device according to claim 4, characterized in that: The inner diameter of the pressure relief chamber gradually decreases from the metal sleeve toward the nozzle.

6. The phase change pneumatic power-generating device according to claim 4, characterized in that: The outer wall of the metal sleeve and the outer wall of the pressure relief cavity are provided with a heat-resistant layer.

7. The phase change pneumatic power-generating device according to claim 1, characterized in that: The outlet of the expansion working pipe is equipped with a rectifier, which includes a housing, a first type of baffle, and a second type of baffle. The first type of baffle is located directly in front of the expansion working pipe, and the second type of baffle is alternately distributed on both sides of the first type of baffle, so that the airflow ejected from the expansion working pipe forms a Z-shaped flow channel inside the housing. Several exhaust holes are provided around the perimeter of the housing.

8. A method for performing work using the phase change aerodynamic work device as described in any one of claims 1-7, characterized in that: Includes the following steps: S1. Connect the compressed air supply branch to the heating mixing phase changer, discharge the seawater in the heating mixing phase changer, and after the set time is reached, disconnect the compressed air supply branch from the heating mixing phase changer. S2. Connect the second pipeline to the phase change medium supply branch, allowing air to enter the phase change medium supply branch and pressurize it to reach the set pressure; S3. Connect the phase change medium supply branch to the heating mixing phase changer, and the liquid medium enters the heating mixing phase changer through the pipeline; S4. The heating mixing phase changer starts heating. The liquid medium is heated and phase-changes into a gaseous medium inside the heating mixing phase changer. The gaseous medium, after being heated and phase-change expanded, is sprayed out from the expansion work pipe for purging. S5. After the set blowing amount is reached, the heating mixing phase changer stops heating and the phase change medium is continuously injected into the heating mixing phase changer for cooling. S6. Disconnect the pipeline and complete the purging process.

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