A seawater dissolved oxygen escaping device and use method

Abstract

A seawater dissolved oxygen escape device and a use method, comprising an escape mechanism, the bottom of which is connected to a pressure control unit; the structure of the escape mechanism is as follows: comprising an outer shell, the inner wall of which is cooperatively mounted with a valve block, a shell body of the outer shell located at the bottom of the valve block is provided with a high-pressure gas output port and a high-pressure gas input port, a side wall of the outer shell located above the valve block is provided with a seawater inlet, a limiting foot is fixedly mounted on the inner wall of the outer shell located above the seawater inlet, a one-way oxygen permeable membrane is mounted in the outer shell located above the limiting foot, and an oxygen cavity is formed above the one-way oxygen permeable membrane; an oxygen inlet is arranged at the middle position of the top surface of the outer shell; a stirring mechanism is arranged at the middle position of the valve block; the structure of the pressure control unit is as follows: a high-pressure gas outlet valve is installed at the high-pressure gas output port, a high-pressure gas inlet valve is installed at the high-pressure gas inlet, and the high-pressure gas outlet valve is connected to the high-pressure gas inlet valve through a gas pipeline; the overall operation is convenient and the working reliability is good.

Description

Technical Field

[0001] The invention relates to the technical field of marine auxiliary assembly, in particular to a seawater dissolved oxygen escape device and a use method thereof. Background Art

[0002] When submarines, underwater manned platforms and submersibles are operating and cruising underwater, sufficient oxygen needs to be provided to ensure normal breathing of the crew.

[0003] At present, conventional power platforms mainly carry compressed oxygen, oxygen candles or oxygen regeneration panels to produce oxygen for crew members to breathe. Oxygen cylinders take up a certain amount of space and restrict the underwater navigation time of the platform. Nuclear power platforms generate oxygen for crew members to breathe by electrolyzing water. The efficiency of electrolyzing water to produce oxygen is low, and other byproducts produced in the process also require energy to be processed.

[0004] In the field of diving, divers usually need to carry enough oxygen for breathing when diving, and the amount of oxygen they carry limits the underwater operation time of divers. In terms of submersible power systems, conventional platforms use fuel cells that consume a lot of oxygen, and carrying oxygen takes up platform space. Currently, the breathing oxygen supply system for underwater platform personnel, platform power oxygen supply submersibles, and divers' breathing oxygen supply system have the following disadvantages:

[0005] (1) For non-regenerative oxygen supply, the oxygen carrying capacity is large, the volume is large, and the platform space is occupied;

[0006] (2) For non-regenerative oxygen supply, the limited oxygen carrying capacity restricts the diving time;

[0007] (3) For regenerative oxygen supply, the conversion efficiency of water electrolysis to produce oxygen is low, and additional energy is required to treat the by-products. Summary of the invention

[0008] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a seawater dissolved oxygen escape device and a method of use, thereby utilizing the large amount of oxygen dissolved in seawater to obtain oxygen from seawater, which has the advantages of utilizing renewable energy, energy saving, and space saving.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A seawater dissolved oxygen escape device comprises an escape mechanism, the bottom of which is connected to a pressure control unit;

[0011] The structure of the escape mechanism is as follows: it comprises a shell, the inner wall surface of the shell is matched with a valve block, a shell body located at the bottom of the valve block is provided with a high-pressure gas output port and a high-pressure gas input port, a side wall of the shell located above the valve block is provided with a seawater inlet, a seawater valve is installed at the seawater inlet, a limiting foot is fixedly installed on the inner wall surface of the shell located above the seawater inlet, the limiting foot is annular in structure, a one-way oxygen permeable membrane is installed in the shell above the limiting foot, the one-way oxygen permeable membrane is used for one-way passage of oxygen from bottom to top, that is, an oxygen cavity is formed above the one-way oxygen permeable membrane; an oxygen inlet is provided at the middle position of the top surface of the shell, an oxygen valve is installed at the oxygen inlet; a stirring mechanism is provided at the middle position of the valve block;

[0012] The structure of the pressure control unit is as follows: a high-pressure gas outlet valve is installed at the high-pressure gas output port, and a high-pressure gas inlet valve is installed at the high-pressure gas input port. The high-pressure gas outlet valve and the high-pressure gas inlet valve are connected through a gas pipeline, and the gas pipeline is connected in series with a vacuum pump valve, a vacuum pump, a high-pressure gas cylinder inlet valve, a high-pressure gas cylinder and a high-pressure gas cylinder outlet valve.

[0013] Its further technical solution is:

[0014] The shell adopts a pressure-resistant structure.

[0015] The structure of the stirring mechanism is as follows: it includes a fixed block arranged in the middle of the valve block, the fixed block and the valve block are arranged in one piece, a threaded hole is opened in the middle of the fixed block, a screw passes through the middle of the threaded hole, a fan blade group is fixed on the top surface of the screw, and a limit block is fixed on the bottom surface of the screw.

[0016] The top surface and the bottom surface of the valve block are both provided with grooves, the groove located on the top surface matches the fan blade group, and the groove located on the bottom surface matches the limit block.

[0017] The seawater valve is a flow control valve.

[0018] The one-way oxygen permeable membrane is made of corrosion-resistant one-way air-permeable material.

[0019] The shell adopts a cylindrical structure.

[0020] The shell is made of high-strength and corrosion-resistant material.

[0021] The valve block, the limiting foot and the stirring mechanism are all made of corrosion-resistant materials.

[0022] A method for using a seawater dissolved oxygen escaping device comprises the following steps:

[0023] S1: Preparation, before starting, all valves are in the closed state;

[0024] S2: High-pressure gas is filled into the high-pressure gas cylinder;

[0025] S3: The initial state in the escape mechanism is a low pressure state;

[0026] S4: Open the seawater valve to control the flow rate so that a fixed volume of seawater enters the shell;

[0027] S5: Close the seawater valve;

[0028] S6: Under the action of seawater pressure, the valve block moves downward, the stirring mechanism rotates and stirs the seawater, and the dissolved oxygen in the seawater escapes under the action of low pressure and enters the oxygen chamber through the one-way oxygen permeable membrane;

[0029] S7: Open the high-pressure gas cylinder outlet valve and the high-pressure gas inlet valve to allow the high-pressure gas to enter the escape mechanism;

[0030] S8: Push the valve block to move vertically upward to open the seawater valve, and the valve block discharges seawater under the action of thrust;

[0031] S9: Close the seawater valve, close the high-pressure gas cylinder outlet valve and the high-pressure gas inlet valve, open the high-pressure gas outlet valve, the vacuum pump valve, the vacuum pump, and the high-pressure gas cylinder inlet valve, and pump the air in the escape mechanism into the high-pressure gas cylinder to establish a low-pressure state inside the escape mechanism;

[0032] S10: Start the next cycle.

[0033] The beneficial effects of the present invention are as follows:

[0034] The invention has a compact and reasonable structure and is easy to operate. The invention cooperates with an escape mechanism and a pressure control unit, wherein the escape mechanism is composed of a shell, an oxygen port, a seawater port, a valve block, a stirring mechanism, a high-pressure gas inlet and outlet, etc., and the pressure control unit is composed of a high-pressure gas cylinder, a vacuum pump, a gas pipeline, etc. The invention utilizes the characteristics that oxygen is dissolved in seawater and can escape after the pressure is reduced, and forms a low-pressure chamber underwater through the pressure control unit to induce the release of dissolved oxygen in the seawater. The invention is a clean and renewable energy source, and can effectively reduce the oxygen carrying capacity of the underwater manned platform, reduce the oxygen carrying space, and remove the restriction of the oxygen carrying capacity on the platform diving time. At the same time, the underwater stay time of the diver can be extended, and the conversion efficiency of the nuclear power platform electric oxygen production is also improved.

[0035] At the same time, the present invention also has the following advantages:

[0036] (1) Utilizes dissolved oxygen in seawater, which is clean, renewable and highly reliable.

[0037] (2) The underwater platform does not need to carry oxygen source from the shore, saving manpower and material resources.

[0038] (3) Energy saving: the device saves the electrical energy consumed in preparing oxygen and processing by-products.

[0039] (4) Save space. Dissolved oxygen is obtained from the ocean, saving the space occupied by oxygen cylinders, oxygen candles, and water electrolysis equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the present invention.

[0041] Figure 2 It is a structural schematic diagram of the escape mechanism of the present invention.

[0042] Figure 3 It is a structural schematic diagram of the stirring mechanism of the present invention.

[0043] Figure 4 It is a schematic structural diagram of the pressure control unit of the present invention.

[0044] Among them: 1. Escape mechanism; 2. Pressure control unit;

[0045] 101, housing; 102, valve block; 103, seawater valve; 104, seawater inlet; 105, limit foot; 106, one-way oxygen permeable membrane; 107, stirring mechanism; 108, oxygen valve; 109, oxygen inlet; 111, high-pressure gas output port; 112, high-pressure gas input port;

[0046] 201, high pressure gas outlet valve; 202, high pressure gas inlet valve; 203, vacuum pump valve; 204, vacuum pump; 205, high pressure gas cylinder inlet valve; 206, high pressure gas cylinder; 207, high pressure gas cylinder outlet valve; 208, gas pipeline;

[0047] 1071. Limit block; 1072. Screw rod; 1073. Fixing block; 1074. Fan blade assembly. DETAILED DESCRIPTION

[0048] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0049] like Figure 1-Figure 4 As shown, the seawater dissolved oxygen escape device of this embodiment includes an escape mechanism 1, and the bottom of the escape mechanism 1 is connected to a pressure control unit 2;

[0050] The structure of the escape mechanism 1 is as follows: it comprises a shell 101, the inner wall surface of the shell 101 is matched with a valve block 102, a high-pressure gas output port 111 and a high-pressure gas input port 112 are arranged on the shell of the shell 101 located at the bottom of the valve block 102, a seawater inlet 104 is arranged on the side wall of the shell 101 located above the valve block 102, a seawater valve 103 is installed at the seawater inlet 104, a limiting foot 105 is fixedly installed on the inner wall surface of the shell 101 located above the seawater inlet 104, the limiting foot 105 is annular in structure, a one-way oxygen permeable membrane 106 is installed in the shell 101 above the limiting foot 105, the one-way oxygen permeable membrane 106 is used for one-way passage of oxygen from bottom to top, that is, an oxygen cavity is formed above the one-way oxygen permeable membrane 106; an oxygen inlet 109 is arranged at the middle position of the top surface of the shell 101, and an oxygen valve 108 is installed at the oxygen inlet 109; a stirring mechanism 107 is arranged at the middle position of the valve block 102;

[0051] The structure of the pressure control unit 2 is as follows: a high-pressure gas outlet valve 201 is installed at the high-pressure gas output port 111, and a high-pressure gas inlet valve 202 is installed at the high-pressure gas input port 112. The high-pressure gas outlet valve 201 is connected to the high-pressure gas inlet valve 202 through a gas pipeline 208, and the gas pipeline 208 is connected in series with a vacuum pump valve 203, a vacuum pump 204, a high-pressure gas cylinder inlet valve 205, a high-pressure gas cylinder 206 and a high-pressure gas cylinder outlet valve 207.

[0052] The housing 101 adopts a pressure-resistant structure.

[0053] The structure of the stirring mechanism 107 is as follows: it includes a fixed block 1073 arranged in the middle of the valve block 102, the fixed block 1073 and the valve block 102 are integrally arranged, a threaded hole is opened in the middle of the fixed block 1073, a screw 1072 passes through the middle of the threaded hole, a fan blade group 1074 is fixed to the top surface of the screw 1072, and a limiting block 1071 is fixed to the bottom surface of the screw 1072.

[0054] The top surface and the bottom surface of the valve block 102 are both provided with grooves, the groove located on the top surface matches the fan blade group 1074, and the groove located on the bottom surface matches the limit block 1071.

[0055] The seawater valve 103 is a flow control valve.

[0056] The one-way oxygen permeable membrane 106 is made of corrosion-resistant one-way air-permeable material.

[0057] The housing 101 has a cylindrical structure.

[0058] The housing 101 is made of high-strength, corrosion-resistant material.

[0059] The valve block 102, the limiting foot 105 and the stirring mechanism 107 are all made of corrosion-resistant materials.

[0060] The method for using the seawater dissolved oxygen escaping device of this embodiment includes the following steps:

[0061] S1: Preparation, before starting, all valves are in the closed state;

[0062] S2: High-pressure gas is filled into the high-pressure gas cylinder 206;

[0063] S3: The initial state in the escape mechanism 1 is a low pressure state;

[0064] S4: Open the seawater valve 103 to control the flow rate so that a fixed volume of seawater enters the housing 101;

[0065] S5: Close the seawater valve 103;

[0066] S6: Under the action of seawater pressure, the valve block 102 moves downward, and the stirring mechanism 107 rotates and stirs the seawater. Under the action of low pressure, the dissolved oxygen in the seawater escapes and enters the oxygen chamber through the one-way oxygen permeable membrane 106;

[0067] S7: Open the high-pressure gas cylinder outlet valve 207 and the high-pressure gas inlet valve 202 to allow the high-pressure gas to enter the escape mechanism 1;

[0068] S8: Push the valve block 102 to move vertically upward, open the seawater valve 103, and the valve block 102 discharges seawater under the action of the thrust;

[0069] S9: Close the seawater valve 103, close the high-pressure gas cylinder outlet valve 207 and the high-pressure gas inlet valve 202, open the high-pressure gas outlet valve 201, the vacuum pump valve 203, the vacuum pump 204, and the high-pressure gas cylinder inlet valve 205, and pump the air in the escape mechanism 1 into the high-pressure gas cylinder 206, so as to establish a low-pressure state inside the escape mechanism 1;

[0070] S10: Start the next cycle.

[0071] The specific structure and function of the seawater dissolved oxygen escape device described in the present invention are as follows:

[0072] It mainly includes an escape mechanism 1, a shell 101, a valve block 102, a seawater valve 103, a seawater port 104, a limit foot 105, a one-way oxygen permeable membrane 106, a stirring mechanism 107, an oxygen valve 108, an oxygen port 109, a high-pressure gas output port 111, a high-pressure gas input port 112, a pressure control unit 2, a high-pressure gas outlet valve 201, a high-pressure gas inlet valve 202, a vacuum pump valve 203, a vacuum pump 204, a high-pressure gas cylinder inlet valve 205, a high-pressure gas cylinder 206, a high-pressure gas cylinder outlet valve 207, a gas pipeline 208, etc.

[0073] The device is suitable for use in marine environments.

[0074] The escape mechanism 1 releases dissolved oxygen in seawater by reducing the pressure of seawater. The outer shell 101 of the escape mechanism 1 is used to withstand the pressure of seawater and seawater corrosion, protect the internal structure, and is made of high-strength and corrosion-resistant materials. The valve block 102 is located inside the outer shell 101, and is watertightly connected to the escape mechanism 1 on all sides. It can move back and forth in the vertical direction. Its upper and lower parts are designed with grooves for embedding when the stirring mechanism 107 moves relative to the valve block 102. The valve block 102 is in direct contact with seawater and is made of corrosion-resistant materials. The seawater valve 103 provides a passage for seawater to enter and exit by opening and closing. The seawater port 104 is a high-pressure seawater inlet channel and is part of the outer shell 101. The first limit foot 105 is used to limit the valve block 102 in the vertical direction. It is located below the one-way oxygen permeable membrane 106 and is hard-connected to the outer shell 101. The limit foot 105 is in direct contact with seawater and is made of corrosion-resistant materials. The one-way oxygen permeable membrane 106 is fixed near the upper end of the escape mechanism 1, and is used for one-way passage of oxygen from bottom to top. It forms an oxygen chamber with the upper part of the shell 101 to separate the seawater from the escaped dissolved oxygen, and adopts corrosion-resistant one-way oxygen permeable material. The stirring mechanism 107 is fixed to the upper end of the valve block 102, and is used to stir the seawater, accelerate the escape of oxygen in the seawater, directly contact the seawater, and adopt corrosion-resistant materials. The oxygen valve 108 provides a passage for oxygen discharge by opening and closing. The oxygen port 109 is the outlet channel after the dissolved oxygen in the seawater escapes, and is a part of the shell 101. The high-pressure gas output port 111 is the channel for the high-pressure gas to be discharged, and is a part of the shell 101. The high-pressure gas input port 112 is the channel for the high-pressure gas to enter, and is a part of the shell 101.

[0075] The pressure control unit 2 controls the internal pressure of the escape mechanism 1 by providing and recovering high-pressure gas to the escape mechanism 1. The high-pressure gas outlet valve 201 provides a passage for the high-pressure gas to be discharged from the escape mechanism 1 by opening and closing. The high-pressure gas inlet valve 202 provides a passage for the high-pressure gas to enter the escape mechanism 1. The vacuum pump valve 203 provides a passage for the gas to enter the vacuum pump 204 by opening and closing. The vacuum pump 204 sucks the gas in the escape mechanism 1 into the high-pressure gas cylinder 206 by doing work. The high-pressure gas cylinder inlet valve 205 provides a passage for the high-pressure gas to enter the high-pressure gas cylinder 206 by opening and closing. The high-pressure gas cylinder 206 provides a storage space for the high-pressure gas. The high-pressure gas cylinder outlet valve 207 provides a passage for the high-pressure gas to be discharged from the high-pressure gas cylinder 206 by opening and closing. The gas pipeline 208 is a gas circulation channel.

[0076] The seawater valve 103 of the device is a flow control valve, which can control the volume of high-pressure seawater entering the escape mechanism 1.

[0077] The escape mechanism 1 of the device is an airtight and watertight cavity.

[0078] The oxygen obtained by the device is located in the oxygen chamber and can be connected to an external gas storage or communication device to store or use the oxygen.

[0079] The stirring mechanism 107 of the device is composed of a limit block 1071 , a screw rod 1072 , a fixing block 1073 , and a fan blade assembly 1074 .

[0080] Among them, the screw 1072 passes through the middle of the fixed block 1073 formed by the valve block 102, and the screw 1072 can move in the vertical direction. The outside of the screw 1072 cooperates with the thread in the middle of the fixed block 1073. The upper part of the screw 1072 is the fan blade group 1074, and the fan blade group 1074 is hard-connected with the screw 1072. When the screw 1072 moves in the vertical direction, it rotates itself and drives the fan blade group 1074 to rotate at the same time. The length of the screw 1072 is greater than the thickness of the valve block 102. The limit block 1071 is located at the bottom of the screw 1072 and is hard-connected to the screw 1072. It is used to limit the bottom when the stirring mechanism 107 moves in the vertical direction. When oxygen escapes, high-pressure seawater enters the escape mechanism 1. Under the action of seawater gravity and seawater pressure, the valve block 102 is forced to move to the bottom of the escape mechanism 1. Under the combined action of bottom pressure and gravity, the stirring mechanism 107 moves upward relative to the valve block 102. The stirring blades are higher than the upper plane of the valve block 102. During the upward movement, the blade group 1074 rotates to stir the seawater and promote the escape of dissolved oxygen.

[0081] Pressure control unit 2 can perform two pressure control actions:

[0082] One is high pressure drainage; the other is to establish low pressure.

[0083] High-pressure drainage is the process of releasing high-pressure gas into the escape mechanism 1, pushing the valve block 102 to move vertically upward, and discharging seawater. When high-pressure drainage is performed, the high-pressure gas outlet valve 201, the high-pressure gas cylinder inlet valve 205, the vacuum pump valve 203, the vacuum pump 204, and the oxygen valve 108 are closed, and the high-pressure gas inlet valve 202, the high-pressure gas cylinder outlet valve 207, and the seawater valve 103 are opened. Establishing low pressure is the process of extracting the gas inside the escape mechanism 1 to a near vacuum. When establishing low pressure, the high-pressure gas outlet valve 201, the vacuum pump valve 203, the vacuum pump 204, the high-pressure gas cylinder inlet valve 205 are opened, and the high-pressure gas cylinder outlet valve 207, the high-pressure gas inlet valve 202, the seawater valve 103, and the oxygen valve 108 are closed.

[0084] Under the control of the pressure control unit 2, there are three states inside the escape mechanism 1:

[0085] (a) Low pressure state;

[0086] (ii) oxygen escape state;

[0087] (3) High pressure state.

[0088] In the low pressure state, the seawater valve 103, the oxygen valve 108, the high pressure gas outlet valve 201 and the high pressure gas inlet valve 202 are all closed, and there is no seawater inside the escape mechanism 1, which is close to a vacuum state.

[0089] When oxygen is escaping, the seawater valve 103, the oxygen valve 108, the high-pressure gas outlet valve 201 and the high-pressure gas inlet valve 202 are all closed, a small amount of seawater is inside the escaping mechanism, and the internal pressure is low.

[0090] In the high pressure state, the seawater valve 103, the oxygen valve 108, the high pressure gas outlet valve 201 and the high pressure gas inlet valve 202 are all closed, and the escape mechanism 1 contains high pressure air without seawater.

[0091] The pressure control unit 2 converts the escape mechanism 1 from the oxygen escape state to the high pressure state through the high pressure drainage action. The high pressure state in the escape mechanism 1 is converted to the low pressure state through the low pressure establishment action. In the low pressure state, the seawater valve 103 is opened to allow the high pressure seawater to enter the escape mechanism 1, and the escape mechanism 1 is converted from the low pressure state to the oxygen escape state.

[0092] When the escape mechanism 1 is in a high pressure state, the valve block 102 moves upward to the top of the housing 101, and under the action of pressure, the fan blade group 1074 of the stirring mechanism 107 is embedded in the groove at the bottom of the valve block 102. In the escape state, under the action of seawater pressure, the valve block 102 moves downward to the bottom of the housing 101, and the limit block 1071 of the stirring mechanism 107 is embedded in the groove at the top of the valve block 102.

[0093] When the escape mechanism 1 is in a high pressure state, under the pressure of the high pressure gas, the valve block 102 moves vertically upward to discharge the seawater, and the end point of the movement of the valve block 102 is the limit foot 105 .

[0094] The volume of the high-pressure gas cylinder 206 of the device is greater than that of the escape mechanism 1. The pressure of the high-pressure gas should be large enough to enable the high-pressure air to push the valve block 102 to discharge seawater. For example, if the volume of the gas cylinder is 800L, the volume of the escape mechanism 1 is 400L, and the high-pressure gas is 6.5MPa, the device can be used at a depth of less than 500 meters.

[0095] In actual working process:

[0096] Before the device is activated, all valve bodies are in a closed state, the high-pressure gas cylinder 206 is filled with high-pressure gas, the escape mechanism 1 is in a low-pressure state, the seawater valve 103 is opened, the flow rate is controlled to allow a fixed volume of seawater to enter the low-pressure chamber, and the seawater valve 103 is closed. Under the action of seawater pressure, the stirring mechanism 107 rotates and stirs the seawater, and the dissolved oxygen in the seawater escapes under the action of low pressure and enters the oxygen chamber through the one-way oxygen permeable membrane 106. The high-pressure gas cylinder outlet valve 207 and the high-pressure gas inlet valve 202 are opened to allow high-pressure gas to enter the escape mechanism 1, pushing the valve block 102 to move vertically upward, and the seawater valve 103 is opened. The valve block 102 discharges seawater under the action of thrust. The seawater valve 103 is closed, the high-pressure gas cylinder outlet valve 207 and the high-pressure gas inlet valve 202 are closed, the high-pressure gas outlet valve 201, the vacuum pump valve 203, the vacuum pump 204, and the high-pressure gas cylinder inlet valve 205 are opened, and the air in the escape mechanism 1 is pumped into the high-pressure gas cylinder 206, and a low-pressure state is established inside the escape mechanism 1, and the next cycle is started.

[0097] Taking advantage of the fact that oxygen is dissolved in seawater and can escape after the pressure is reduced, a low-pressure chamber is formed underwater through the pressure control unit 2 to induce the release of dissolved oxygen in the seawater. This is a clean and renewable energy source that can effectively reduce the amount of oxygen carried by the underwater manned platform, reduce the oxygen carrying space, and remove the constraints of the oxygen carrying capacity on the platform's diving time. At the same time, it can extend the diver's underwater stay time and improve the conversion efficiency of the nuclear-powered platform's electric power to oxygen.

[0098] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A seawater dissolved oxygen escape device, characterized in that: It comprises an escape mechanism (1), the bottom of which is connected to a pressure control unit (2); The structure of the escape mechanism (1) is as follows: it comprises a housing (101), the inner wall surface of the housing (101) is matched with a valve block (102), a shell of the housing (101) located at the bottom of the valve block (102) is provided with a high-pressure gas output port (111) and a high-pressure gas input port (112), a side wall of the housing (101) located above the valve block (102) is provided with a seawater inlet (104), a seawater valve (103) is installed at the seawater inlet (104), and a valve (104) is fixedly installed on the inner wall surface of the housing (101) located above the seawater inlet (104). A limiting foot (105) is provided, wherein the limiting foot (105) is in an annular structure; a one-way oxygen permeable membrane (106) is installed in the housing (101) above the limiting foot (105); the one-way oxygen permeable membrane (106) is used for one-way oxygen passing from bottom to top, that is, an oxygen cavity is formed above the one-way oxygen permeable membrane (106); an oxygen port (109) is provided in the middle of the top surface of the housing (101), and an oxygen valve (108) is installed at the oxygen port (109); and a stirring mechanism (107) is provided in the middle of the valve block (102); The structure of the pressure control unit (2) is as follows: a high-pressure gas outlet valve (201) is installed at the high-pressure gas output port (111), a high-pressure gas inlet valve (202) is installed at the high-pressure gas input port (112), the high-pressure gas outlet valve (201) and the high-pressure gas inlet valve (202) are connected via a gas pipeline (208), and a vacuum pump valve (203), a vacuum pump (204), a high-pressure gas cylinder inlet valve (205), a high-pressure gas cylinder (206) and a high-pressure gas cylinder outlet valve (207) are sequentially connected in series on the gas pipeline (208).

2. A seawater dissolved oxygen escape device as claimed in claim 1, characterized in that: The housing (101) adopts a pressure-resistant structure.

3. A seawater dissolved oxygen escape device as claimed in claim 1, characterized in that: The structure of the stirring mechanism (107) is as follows: it includes a fixed block (1073) arranged in the middle of the valve block (102), the fixed block (1073) and the valve block (102) are arranged in an integrated manner, a threaded hole is opened in the middle of the fixed block (1073), a screw rod (1072) passes through the middle of the threaded hole, a fan blade group (1074) is fixed to the top surface of the screw rod (1072), and a limiting block (1071) is fixed to the bottom surface of the screw rod (1072).

4. A seawater dissolved oxygen escape device as claimed in claim 3, characterized in that: The top surface and the bottom surface of the valve block (102) are both provided with grooves, the groove located on the top surface matches the fan blade group (1074), and the groove located on the bottom surface matches the limit block (1071).

5. A seawater dissolved oxygen escaping device as claimed in claim 1, characterized in that: The seawater valve (103) is a flow control valve.

6. A seawater dissolved oxygen escape device as claimed in claim 1, characterized in that: The one-way oxygen permeable membrane (106) is made of corrosion-resistant one-way air-permeable material.

7. A seawater dissolved oxygen escaping device as claimed in claim 1, characterized in that: The housing (101) has a cylindrical structure.

8. A seawater dissolved oxygen escaping device as claimed in claim 1, characterized in that: The housing (101) is made of high-strength, corrosion-resistant material.

9. A seawater dissolved oxygen escaping device as claimed in claim 1, characterized in that: The valve block (102), the limiting foot (105) and the stirring mechanism (107) are all made of corrosion-resistant materials.

10. A method for using the seawater dissolved oxygen escaping device according to claim 1, characterized in that: The steps are as follows: S1: Preparation, before starting, all valves are in the closed state; S2: The high-pressure gas cylinder (206) is filled with high-pressure gas; S3: the initial state inside the escape mechanism (1) is a low pressure state; S4: opening the seawater valve (103) to control the flow rate so that a fixed volume of seawater enters the housing (101); S5: Close the seawater valve (103); S6: Under the action of seawater pressure, the valve block (102) moves downward, and the stirring mechanism (107) rotates to stir the seawater. Under the action of low pressure, dissolved oxygen in the seawater escapes and enters the oxygen chamber through the one-way oxygen permeable membrane (106); S7: Open the high-pressure gas cylinder outlet valve (207) and the high-pressure gas inlet valve (202) to allow the high-pressure gas to enter the escape mechanism (1); S8: pushing the valve block (102) to move vertically upward, opening the seawater valve (103), and the valve block (102) discharges seawater under the action of the thrust; S9: Close the seawater valve (103), close the high-pressure gas cylinder outlet valve (207) and the high-pressure gas inlet valve (202), open the high-pressure gas outlet valve (201), the vacuum pump valve (203), the vacuum pump (204), and the high-pressure gas cylinder inlet valve (205), and pump the air in the escape mechanism (1) into the high-pressure gas cylinder (206), thereby establishing a low-pressure state inside the escape mechanism (1); S10: Start the next cycle.

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