An emergency floatation release system for a manned submersible and method of operation

Abstract

The present application relates to a kind of emergency buoy release system suitable for manned submersible and operating method, including manned cabin, emergency buoy manual release drive device is arranged in the inside of manned cabin, emergency buoy timing automatic release device is arranged in the outside of manned cabin, further including emergency buoy control device installed on manned submersible, the release of manned submersible emergency buoy is realized by two kinds of control mode of automatic or manual, buoy is floated to water surface under the traction of its larger positive buoyancy.The present application can play an important role when positioning search and rescue is needed for the rescue of manned submersible under water cannot normally float.

Description

Technical Field

[0001] This invention relates to the field of manned submersible release system technology, and in particular to an emergency buoy release system and operating method suitable for manned submersibles. Background Technology

[0002] With the rapid development of underwater manned technology, the application of manned submersibles has shifted from simple underwater exploration to underwater operations. This increases the duration of underwater operations and the difficulty of manned submersible operations, undoubtedly increasing the probability of them running aground and being unable to surface. When a manned submersible is unable to communicate with the surface for various reasons, it can be located by surface rescue forces after releasing an emergency buoy. The surface rescue forces can then roughly determine the location of the manned submersible and initiate a rescue operation.

[0003] In existing technologies, emergency buoy release devices used in manned submersibles employ either electro-explosive bolts or hydraulic release mechanisms. Electro-explosive bolts are disposable products, and their functionality cannot be routinely checked. If they are needed underwater but malfunction, the emergency buoy cannot be released. While hydraulic release devices can be checked for deck release functionality, if the manned submersible's hydraulic system is unusable underwater, the emergency buoy release device will lack power and fail to release the buoy. Summary of the Invention

[0004] In response to the shortcomings of the existing production technology, the applicant provides an emergency buoy release system and operation method suitable for manned submersibles. The system allows for the release of emergency buoys through both manual operation by the pilot inside the manned cabin and automatic control by a timer device outside the cabin, with each acting as a backup to ensure that the manned submersible can successfully release emergency buoys when needed.

[0005] The technical solution adopted in this invention is as follows:

[0006] An emergency buoy release system suitable for manned submersibles includes a manned cabin. Inside the manned cabin is a manual release actuator for the emergency buoy. The system structure of the manual release actuator includes a manual pump, with a check valve and a normally closed valve connected in series via pipelines at the pump's output end. A pressure gauge and a safety valve are installed on the pipeline between the manual pump and the check valve. Outside the manned cabin is a timed automatic release device for the emergency buoy. The system structure of the timed automatic release device includes an accumulator, a normally closed two-position two-way solenoid valve, and a timer connected in series via pipelines. The pipeline between the accumulator and the normally closed two-position two-way solenoid valve... It is equipped with a normally open valve and a No. 2 pressure gauge; it also includes an emergency buoy control device installed on the manned submersible. The system structure of the emergency buoy control device is as follows: it includes a cable drum, a float, a drum locking cylinder, a cylinder compensator, a normally open two-position two-way hydraulic directional valve and a damping orifice. The normally open two-position two-way hydraulic directional valve is simultaneously connected to the normally closed two-position two-way solenoid directional valve, the emergency buoy manual release drive device and the drum locking cylinder. At the same time, one end of the normally open two-position two-way hydraulic directional valve is connected to the damping orifice and the cylinder compensator. The drum locking cylinder is connected to the cable drum. A float is installed on the cable drum. The rodless chamber of the drum locking cylinder is also connected to the cylinder compensator and the damping orifice.

[0007] Its further technical solution lies in:

[0008] The end of the cable reel is provided with a side plate, and the side plate has evenly distributed limiting holes.

[0009] The side panels are made of circular thin plates.

[0010] The rod chamber of the drum locking cylinder is equipped with a piston rod. The piston rod is initially fully extended, and the head of the piston rod is inserted into one of the limiting holes, so that the cable drum cannot rotate, thereby pulling the float through the cable and preventing the float from floating.

[0011] The diameter of the piston rod is smaller than the diameter of the limiting hole.

[0012] There are 12 limiting holes.

[0013] Two normally closed valves are connected in series.

[0014] An operating method for an emergency buoy release system suitable for manned submersibles includes the following operating steps:

[0015] (a) Accumulator charging:

[0016] When the pressure of the hydraulic oil stored in the accumulator is observed to be lower than the minimum operating pressure from pressure gauge number two, the accumulator can be pressurized using the manual device inside the chamber, as follows:

[0017] Open the two normally closed valves installed on the transom components, and use the timer to supply power to the normally closed two-position two-way solenoid directional valve. Inside the manned cabin, the pilot continuously presses the manual pump to output high-pressure oil. Under the control of the high-pressure oil, the normally open two-position two-way hydraulic directional valve switches to the closed state. The high-pressure oil in the manual pump first enters the rod chamber on the right side of the drum locking cylinder. After the piston rod moves to the left to its limit position, the hydraulic oil output by the manual pump enters the accumulator through the opened normally closed two-position two-way solenoid directional valve. When the pressure in the accumulator reaches the maximum operating pressure, the timer stops supplying power to the normally closed two-position two-way solenoid directional valve, and the normally closed two-position two-way solenoid directional valve closes.

[0018] As a further improvement to the above technical solution:

[0019] Used to protect various hydraulic components;

[0020] (ii) Cable drum locking:

[0021] After closing the normally closed two-position two-way solenoid directional valve and the normally closed valve, the hydraulic oil in the cylinder compensator enters the rodless chamber of the drum locking cylinder. The piston rod moves to the left under the action of the hydraulic oil. At the same time, the cable drum is manually rotated so that the piston rod can be inserted into the limit hole on the side plate. The hydraulic oil in the rod chamber on the right side of the drum locking cylinder enters the rodless chamber of the drum locking cylinder through the normally open two-position two-way hydraulic directional valve and the damping hole. At this time, the drum locking cylinder is a differential cylinder.

[0022] (III) Stress Compensation:

[0023] When the manned submersible descends, as the depth increases, the external seawater pressure is introduced into the rod-side and rodless-side chambers of the drum locking cylinder in real time through pipes, damping orifices, and normally open two-position two-way hydraulic directional valves via the compensation action of the cylinder compensator, thus balancing the pressure in the drum locking cylinder. When the manned submersible ascends, the pressure in the chambers on both sides of the drum locking cylinder is released to the cylinder compensator through pipes, damping orifices, and normally open two-position two-way hydraulic directional valves, preventing the piston rod of the drum locking cylinder from moving under the action of internal pressure.

[0024] (iv) Manually deploy emergency buoys from inside the cabin:

[0025] When a manned submersible is unable to surface normally underwater and needs to release an emergency buoy, it can be released manually. The specific method is as follows:

[0026] The shut-off valve is opened, and the driver repeatedly presses the manual pump handle.

[0027] Normally open two-position two-way hydraulic directional valve switches to closed mode under the action of high-pressure oil.

[0028] As the piston rod moves to the left, hydraulic oil in the rodless chamber of the drum locking cylinder flows into the cylinder compensator, at which point the pressure in the pressure gauge remains essentially constant.

[0029] The pilot inside the cabin can observe from the pressure gauge that after continuing to press the manual pump handle, the output hydraulic oil pressure rises rapidly until it reaches the safety valve set pressure. At this point, the pressure value on the pressure gauge can be used to determine that the emergency buoy has been released.

[0030] (v) Automatic deployment of emergency buoys outside the cabin:

[0031] The timer trigger time is 2 to 3 hours longer than the maximum normal underwater working time of the manned submersible. When the manned submersible's underwater working time exceeds the timer's set time, the timer automatically supplies power to the normally closed two-position two-way solenoid directional valve. The solenoid valve opens, and the accumulator pressure oil closes the two-position two-way hydraulic directional valve. At the same time, it enters the rod chamber on the right side of the drum locking cylinder, and the piston rod moves to the left. Meanwhile, the hydraulic oil in the rodless chamber of the drum locking cylinder flows into the cylinder compensator until the piston rod moves to the leftmost end. After that, the accumulator no longer supplies oil to the rod chamber of the drum locking cylinder, and the emergency buoy release is completed.

[0032] The beneficial effects of this invention are as follows:

[0033] This invention features a compact and rational structure, and is easy to operate. It achieves this through the coordinated operation of components such as the buoy, cable reel, locking cylinder, and release mechanism.

[0034] The locking cylinder described in this invention is used to lock the cable reel, thereby preventing the buoy from rising even though it has a large positive buoyancy, because it is always pulled by the cable.

[0035] When a manned submersible needs to release a buoy in an emergency, the pilot inside the cabin can operate the manual pump and corresponding control valves to open the drum locking cylinder. The cable drum can then rotate freely, causing the buoy to rise to the surface under the force of positive buoyancy.

[0036] In addition, if the manual control device inside the manned submersible fails, an emergency buoy can be released via an external timed automatic release device.

[0037] This invention enables the release of emergency buoys from manned submersibles through both automatic and manual control methods. The buoys rise to the surface under the pull of their own large positive buoyancy.

[0038] This invention plays an important role in locating and rescuing manned submersibles that are unable to surface normally underwater and require external assistance. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the present invention.

[0040] Figure 2 This is a partial schematic diagram of the present invention.

[0041] Figure 3 This is a schematic diagram of the interior of the manned cabin of the present invention.

[0042] Figure 4 This is a front view of the cable reel baffle of the present invention.

[0043] The components include: 1. Manual pump; 2. Safety valve; 3. Pressure gauge No. 1; 4. Check valve; 5. Normally closed valve; 6. Cable reel; 7. Float; 8. Reel locking cylinder; 9. Cylinder compensator; 10. Accumulator; 11. Normally open valve; 12. Pressure gauge No. 2; 13. Timer; 14. Normally closed two-position two-way solenoid directional valve; 15. Normally open two-position two-way hydraulic directional valve; 16. Damping orifice.

[0044] 601. Side plate; 602. Limiting hole;

[0045] 801. Piston rod. Detailed Implementation

[0046] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0047] like Figures 1-4 As shown, the emergency buoy release system applicable to manned submersibles in this embodiment includes a manned cabin. Inside the manned cabin, a manual release drive device for the emergency buoy is installed. The system structure of the manual release drive device includes a manual pump 1. The output end of the manual pump 1 is connected in series with a one-way valve 4 and a normally closed valve 5 via a pipeline. A pressure gauge 3 and a safety valve 2 are installed on the pipeline between the manual pump 1 and the one-way valve 4. Outside the manned cabin, an automatic timed release device for the emergency buoy is installed. The system structure of the automatic timed release device includes an accumulator 10, a normally closed two-position two-way solenoid valve 14, and a timer 13 connected in series via a pipeline. A normally open valve 11 and a pressure gauge 12 are installed on the pipeline between the accumulator 10 and the normally closed two-position two-way solenoid valve 14. The system also includes an emergency buoy control device installed on the manned submersible.

[0048] The system structure of the emergency buoy control device includes a cable drum 6, a float 7, a drum locking cylinder 8, a cylinder compensator 9, a normally open two-position two-way hydraulic directional valve 15, and a damping orifice 16. The normally open two-position two-way hydraulic directional valve 15 is simultaneously connected to the normally closed two-position two-way solenoid directional valve 14, the emergency buoy manual release drive device, and the drum locking cylinder 8. At the same time, one end of the normally open two-position two-way hydraulic directional valve 15 is connected to the damping orifice 16 and the cylinder compensator 9. The drum locking cylinder 8 is connected to the cable drum 6. The float 7 is installed on the cable drum 6. The rodless chamber of the drum locking cylinder 8 is also connected to the cylinder compensator 9 and the damping orifice 16.

[0049] The end of the cable reel 6 is provided with a side plate 601, and the side plate 601 has evenly distributed limiting holes 602.

[0050] Side panel 601 adopts a circular thin plate structure.

[0051] The rod chamber of the drum locking cylinder 8 is equipped with a piston rod 801. The piston rod 801 is initially fully extended. The head of the piston rod 801 is inserted into one of the limiting holes 602, so that the cable drum 6 cannot rotate, thereby pulling the float 7 through the cable and preventing the float 7 from floating.

[0052] The diameter of piston rod 801 is smaller than the diameter of limiting hole 602.

[0053] There are 12 limiting holes 602.

[0054] There are two normally closed valves 5 connected in series.

[0055] The specific structure and function of the emergency buoy release system for manned submersibles described in this invention are as follows:

[0056] The main components include a manual pump 1, a safety valve 2, a pressure gauge 3, a check valve 4, and a normally closed valve 5, which together form an emergency buoy manual release drive device, placed inside the manned cabin.

[0057] It consists of an accumulator 10, a normally open valve 11, a second pressure gauge 12, a timer 13, and a normally closed two-position two-way solenoid directional valve 14, and is placed outside the manned cabin.

[0058] The emergency buoy control device consists of a cable reel 6, a float 7, a reel locking cylinder 8, a cylinder compensator 9, a normally open two-position two-way hydraulic control directional valve 15, and a damping orifice 16, and is placed at a suitable location on the manned submersible.

[0059] As attached Figure 3As shown, the piston rod 801 of the drum locking cylinder 8 is initially fully extended. The piston rod 801 is inserted into a limiting hole 602 of the side plate 601 of the cable drum 6, so that the cable drum 6 cannot rotate, thereby pulling the float 7 through the cable and preventing the float 7 from floating.

[0060] This system allows the driver to operate the manual pump 1 and normally closed valve 5 from inside the cockpit to open the cable reel locking cylinder 8, enabling the cable reel 6 to rotate freely under the drag of the float 7, thus releasing the float 7. Simultaneously, the system can also be set by a timer 13. When the set time expires, the timer 13 energizes the normally closed two-position two-way solenoid valve 14, causing pressurized oil from the accumulator 10 to enter the piston rod chamber of the cable reel locking cylinder 8, thereby opening the cylinder and allowing the cable reel 6 to rotate freely under the drag of the float 7, thus releasing the float 7.

[0061] The emergency buoy can be deployed through two methods: manual operation by the pilot inside the cabin and automatic control by a timer device outside the cabin. These methods serve as backups for each other, ensuring that the manned submersible can successfully deploy the emergency buoy when needed.

[0062] In actual work process:

[0063] I. Accumulator 10 charging:

[0064] As attached Figure 1 As shown, when the hydraulic oil pressure stored in the accumulator 10 is observed to be lower than the minimum operating pressure from pressure gauge 12, the accumulator 10 can be pressurized using the manual device inside the compartment, as follows:

[0065] Open the two normally closed valves 5 installed on the transom components. Use timer 13 to supply power to the normally closed two-position two-way solenoid directional valve 14. Inside the manned cabin, the pilot continuously presses the manual pump 1 to output high-pressure oil. Under the control of the high-pressure oil, the normally open two-position two-way hydraulic directional valve 15 switches to the closed state. The high-pressure oil in the manual pump 1 first enters the rod chamber on the right side of the drum locking cylinder 8. After the piston rod 801 moves to the left to its limit position, the hydraulic oil output by the manual pump 1 enters the accumulator 10 through the opened normally closed two-position two-way solenoid directional valve 14. When the pressure in the accumulator 10 reaches the maximum operating pressure, timer 13 stops supplying power to the normally closed two-position two-way solenoid directional valve 14, and the normally closed two-position two-way solenoid directional valve 14 closes. The safety valve 2 inside the manned cabin is used to set the maximum output pressure of the manual pump 1 and to protect the hydraulic components.

[0066] II. Cable drum locking:

[0067] As attached Figure 1As shown, after closing the normally closed two-position two-way solenoid directional valve 14 and the normally closed valve 5, the hydraulic oil in the cylinder compensator 9 enters the rodless chamber of the drum locking cylinder 8. The piston rod 801 moves to the left under the action of the hydraulic oil. At the same time, the cable drum 6 is manually rotated so that the piston rod 801 can be inserted into the limiting hole 602 on the side plate 601. The hydraulic oil in the rod chamber on the right side of the drum locking cylinder 8 enters the rodless chamber of the drum locking cylinder 8 through the normally open two-position two-way hydraulic directional valve 15 and the damping hole 16. At this time, the drum locking cylinder 8 is a differential cylinder.

[0068] III. Stress Compensation:

[0069] As attached Figure 1 As shown, when the manned submersible descends, with the increase in depth, the external seawater pressure is introduced in real time into the rod-side and rodless-side chambers of the drum locking cylinder 8 through the pipe, damping orifice 16, and normally open two-position two-way hydraulic directional valve 15 via the compensation action of the cylinder compensator 9, thus balancing the pressure in the drum locking cylinder 8. When the manned submersible ascends, the pressure in the chambers on both sides of the drum locking cylinder 8 is released to the cylinder compensator 9 through the pipe, damping orifice 16, and normally open two-position two-way hydraulic directional valve 15, preventing the piston rod 801 of the drum locking cylinder 8 from moving under the action of internal pressure.

[0070] IV. Manually deploy emergency buoys from inside the cabin:

[0071] As attached Figure 1 As shown, when a manned submersible is unable to surface normally underwater and needs to release an emergency buoy, it can be released manually. The specific method is as follows:

[0072] Open the normally closed valve 5, and the operator continuously presses the handle of the manual pump 1. High-pressure oil is continuously output, and the normally open two-position two-way hydraulic directional valve 15 switches to the closed mode under the action of the high-pressure oil. The high-pressure oil output from the manual pump 1 continuously enters the rod chamber on the right side of the drum locking cylinder 8, causing the piston rod 801 to move to the left. Simultaneously, hydraulic oil in the rodless chamber of the drum locking cylinder 8 flows into the cylinder compensator 9. At this time, the pressure in pressure gauge 3 remains essentially constant. When the piston rod 801 moves to the far left, the operator inside the cabin can observe from pressure gauge 3 that, upon continuing to press the handle of the manual pump 1, the output hydraulic oil pressure rises rapidly until it reaches the set pressure of safety valve 2. At this point, the pressure value on pressure gauge 3 indicates that the emergency buoy has been released.

[0073] V. Automatic deployment of emergency buoys outside the cabin:

[0074] The trigger time of timer 13 is 2 to 3 hours longer than the maximum normal underwater working time of the manned submersible. When the manned submersible's underwater working time exceeds the time set by timer 13, timer 13 automatically supplies power to the normally closed two-position two-way solenoid directional valve 14. The solenoid valve opens, and the pressure oil of accumulator 10 closes the normally open two-position two-way hydraulic directional valve 15. At the same time, it enters the rod chamber on the right side of the drum locking cylinder 8, and the piston rod 801 moves to the left. At the same time, the hydraulic oil in the rodless chamber of the drum locking cylinder 8 flows into the cylinder compensator 9 until the piston rod 801 moves to the leftmost end. After that, accumulator 10 no longer supplies oil to the rod chamber of the drum locking cylinder 8, and the emergency buoy release is completed.

[0075] This invention has a pressure compensation function and can be used at any water depth.

[0076] This invention has two methods: manual operation inside the cabin and automatic control outside the cabin. The two methods do not interfere with each other and serve as backups for each other.

[0077] The extravehicular automatic release device described in this invention is also applicable to various types of unmanned submersibles.

[0078] The buoy described in this invention uses a cable evenly wound on a drum for positioning. When the buoy rises, the positive buoyancy of the buoy drives the drum to rotate and release the cable. It has a certain damping, which can effectively avoid the phenomenon of the cable getting tangled or stuck when the buoy rises too fast during release.

[0079] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. An emergency buoy release system suitable for manned submersibles, comprising a manned cabin, characterized in that: An emergency buoy manual release drive device is installed inside the manned cabin. The system structure of the emergency buoy manual release drive device is as follows: it includes a manual pump (1), and the output end of the manual pump (1) is connected in series with a one-way valve (4) and a normally closed valve (5) through a pipeline. A pressure gauge (3) and a safety valve (2) are installed on the pipeline between the manual pump (1) and the one-way valve (4). An emergency buoy timed automatic release device is installed outside the manned cabin. The system structure of the emergency buoy timed automatic release device is as follows: it includes an accumulator (10), a normally closed two-position two-way solenoid valve (14), and a timer (13) connected in series via pipelines. A normally open valve (11) and a pressure gauge (12) are installed on the pipeline between the accumulator (10) and the normally closed two-position two-way solenoid valve (14); it also includes an emergency buoy control device installed on the manned submersible. The system structure of the emergency buoy control device is as follows: including a cable drum (6), a float (7), a drum locking cylinder (8), a cylinder compensator (9), a normally open two-position two-way hydraulic control valve (15), and a damping hole (16). The normally open two-position two-way hydraulic control valve (15) is connected to the normally closed two-position two-way solenoid valve (14), the emergency buoy manual release drive device, and the drum locking cylinder (8) at the same time. At the same time, one end of the normally open two-position two-way hydraulic control valve (15) is connected to the damping hole (16) and the cylinder compensator (9). The drum locking cylinder (8) is connected to the cable drum (6). A float (7) is provided on the cable drum (6). The rodless chamber of the drum locking cylinder (8) is also connected to the cylinder compensator (9) and the damping hole (16).

2. The emergency buoy release system for manned submersibles as described in claim 1, characterized in that: The end of the cable reel (6) is provided with a side plate (601), and the side plate (601) has evenly distributed limiting holes (602).

3. The emergency buoy release system for manned submersibles as described in claim 2, characterized in that: The side panel (601) adopts a circular thin plate structure.

4. An emergency buoy release system suitable for manned submersibles as described in claim 3, characterized in that: The rod chamber of the drum locking cylinder (8) is provided with a piston rod (801). The piston rod (801) is initially fully extended. The head of the piston rod (801) is inserted into one of the limiting holes (602), so that the cable drum (6) cannot rotate, thereby pulling the float (7) through the cable and preventing the float (7) from floating.

5. An emergency buoy release system suitable for manned submersibles as described in claim 4, characterized in that: The diameter of the piston rod (801) is smaller than the diameter of the limiting hole (602).

6. An emergency buoy release system suitable for manned submersibles as described in claim 5, characterized in that: There are 12 limiting holes (602).

7. An emergency buoy release system for manned submersibles as described in claim 1, characterized in that: Two normally closed valves (5) are connected in series.

8. An operating method for an emergency buoy release system suitable for manned submersibles as described in claim 6, characterized in that: The following steps are included: (a) Charging of accumulator (10): When the pressure of the hydraulic oil stored in the accumulator (10) is lower than the minimum operating pressure as observed from pressure gauge (12), the accumulator (10) can be pressurized using the manual device inside the cabin. The method is as follows: open the two normally closed valves (5) installed on the cabin penetration parts, use timer (13) to supply power to the normally closed two-position two-way solenoid directional valve (14), and the driver inside the manned cabin continuously presses the manual pump (1) to output high-pressure oil. Under the control of the high-pressure oil, the normally open two-position two-way hydraulic directional valve (15) switches to the closed state, and the high-pressure oil in the manual pump (1) first... After the piston rod (801) moves to the left limit position in the rod chamber on the right side of the drum locking cylinder (8), the hydraulic oil output by the manual pump (1) enters the accumulator (10) through the normally closed two-position two-way solenoid directional valve (14). When the pressure in the accumulator (10) reaches the maximum operating pressure, the timer (13) stops supplying power to the normally closed two-position two-way solenoid directional valve (14), and the normally closed two-position two-way solenoid directional valve (14) closes. The safety valve (2) in the manned cabin is used to set the maximum output pressure of the manual pump (1) and to protect each hydraulic component. (ii) Cable drum (6) Locking: After closing the normally closed two-position two-way solenoid directional valve (14) and the normally closed valve (5), the hydraulic oil in the cylinder compensator (9) enters the rodless chamber of the drum locking cylinder (8). The piston rod (801) moves to the left under the action of the hydraulic oil. At the same time, the cable drum (6) is manually rotated so that the piston rod (801) can be inserted into the limiting hole (602) on the side plate (601). The hydraulic oil in the rod chamber on the right side of the drum locking cylinder (8) enters the rodless chamber of the drum locking cylinder (8) through the normally open two-position two-way hydraulic directional valve (15) and the damping hole (16). At this time, the drum locking cylinder (8) is a differential cylinder. (III) Stress Compensation: When the manned submersible descends, as the depth increases, the external seawater pressure is introduced into the rod chamber and rodless chamber of the drum locking cylinder (8) in real time through the pipe, damping hole (16) and normally open two-position two-way hydraulic control valve (15) through the compensation effect of the cylinder compensator (9), so that the pressure of the drum locking cylinder (8) is balanced. When the manned submersible ascends, the pressure in the chambers on both sides of the drum locking cylinder (8) is released to the cylinder compensator (9) through the pipe, damping hole (16) and normally open two-position two-way hydraulic control valve (15), so as to prevent the piston rod (801) of the drum locking cylinder (8) from moving under the action of internal pressure. (iv) Manually deploy emergency buoys from inside the cabin: When a manned submersible is unable to surface normally underwater and needs to release an emergency buoy, it can be released manually. The specific method is as follows: Open the normally closed valve (5), and the driver continuously presses the handle of the manual pump (1); high-pressure oil is continuously output, and the normally open two-position two-way hydraulic control directional valve (15) switches to the closed mode under the action of high-pressure oil; the high-pressure oil output by the manual pump (1) continuously enters the rod chamber on the right side of the drum locking cylinder (8), the piston rod (801) moves to the left, and at the same time, the hydraulic oil in the rodless chamber of the drum locking cylinder (8) flows into the cylinder compensator (9). At this time, the pressure in the first pressure gauge (3) is basically constant; when the piston rod (801) moves to the leftmost end, the driver in the cabin can observe at the first pressure gauge (3) that after continuing to press the handle of the manual pump (1), the output hydraulic oil pressure rises rapidly until it reaches the set pressure of the safety valve (2). At this time, the emergency buoy can be judged by the pressure value of the first pressure gauge (3). (v) Automatic deployment of emergency buoys outside the cabin: The trigger time of the timer (13) is 2 to 3 hours longer than the maximum underwater normal working time of the manned submersible. When the underwater working time of the manned submersible exceeds the timer's set time, the timer (13) automatically supplies power to the normally closed two-position two-way solenoid directional valve (14), the solenoid valve opens, the pressure oil of the accumulator (10) closes the normally open two-position two-way hydraulic directional valve (15), and at the same time enters the rod chamber on the right side of the drum locking cylinder (8), the piston rod (801) moves to the left, and at the same time the hydraulic oil in the rodless chamber of the drum locking cylinder (8) flows into the cylinder compensator (9) until the piston rod (801) moves to the leftmost end, the accumulator (10) no longer supplies oil to the rod chamber of the drum locking cylinder (8), and the emergency buoy release is completed.

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