A deep-depth saturation diving fire-fighting system

Abstract

A deep-sea saturation diving firefighting system comprises a fire fighting tank and a backup fire fighting tank of identical structure, a freshwater source, and a high-pressure mixed gas source. The output end of the freshwater source is connected to a No. 1 main pipe, to which a freshwater pump and a No. 1 check valve are installed in series. The No. 1 main pipe branches into two routes: one route is connected to the fire fighting tank via a freshwater electric ball valve, and the other route is connected to the backup fire fighting tank via a backup freshwater electric ball valve. The output end of the high-pressure mixed gas source is connected to a No. 2 main pipe, which branches into two routes: one route is connected to the fire fighting tank via a high-pressure electric ball valve, and the other route is connected to the backup fire fighting tank via a backup high-pressure electric ball valve. The system also includes a living cabin with a fire sprinkler installed on top. The middle portion of the connecting pipe between the fire fighting tank and the backup fire fighting tank is connected to the fire sprinkler via a pipe. The pipe is connected in series with a blow-through drain valve, a manual ball valve, a No. 2 check valve, and a pressure switch. This system can achieve cabin fire extinguishing functions under high pressure and cabin pressure fluctuations.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting systems, in particular to a deep-depth saturation diving fire fighting system. Background Art

[0002] Saturation diving is a diving method suitable for prolonged operations at great depths. Conventional diving, or air diving, is possible at depths of several dozen meters. However, as depth increases, breathing ordinary air underwater can cause nitrogen narcosis under high pressure. Deeper dives can only be performed by breathing a mixture of inert gases like helium and oxygen.

[0003] The saturation diving system consists of equipment such as a living chamber and a diving bell. The saturation diving process is as follows: the diver first lives in the living chamber. According to a prescribed procedure, the chamber is pressurized with a high-pressure helium-oxygen mixture, saturating the diver's body with inert gases at the predetermined operating pressure. When diving operations are required, the diver enters the living chamber and enters a diving bell at the same pressure. The diving bell is then lowered to the designated deep-sea operation site. The diver, wearing a diving suit, swims out of the diving bell to the deep sea for the operation. After completing the operation, the diving bell is returned to the mother ship via the diving bell hoisting system. The diver then returns to the living chamber to rest and await the next mission. After all operations are completed, the diver slowly reduces the chamber pressure to normal atmospheric pressure according to prescribed procedures.

[0004] Based on current development trends in saturation diving systems, the maximum cabin pressure in a saturation diving accommodation chamber can reach 5MPa to 10MPa. This means that throughout the saturation diving operation, the cabin pressure will increase from 0.1MPa to 10MPa and then decrease back to 0.1MPa. There is currently no precedent for the design and application of fire extinguishing systems in a cabin with such drastic pressure fluctuations and a maximum pressure of 10MPa, making the design of such a fire extinguishing system a challenge. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a deep-depth saturation diving fire-fighting system, which can realize the fire-fighting function of the cabin under the conditions of high pressure and cabin pressure changes.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] A deep-depth saturation diving fire-fighting system comprises a fire-fighting tank and a spare fire-fighting tank, which are arranged in parallel and interconnected. The fire-fighting tank is equipped with a fire-fighting tank pressure switch, a fire-fighting tank safety valve, a fire-fighting tank exhaust electric ball valve, a high water level sensor, and a low water level sensor. The spare fire-fighting tank is equipped with a spare fire-fighting tank pressure switch, a spare fire-fighting tank safety valve, a spare fire-fighting tank exhaust electric ball valve, a spare high water level sensor, and a spare low water level sensor. The system also comprises a fresh water source and a high-pressure mixed gas source. The output end of the fresh water source is connected to a No. 1 main pipe. A fresh water pump and a No. 1 check valve are installed in series on the No. 1 main pipe. The No. 1 main pipe branches into two routes, one route is connected to the fire-fighting tank through the fresh water electric ball valve, and the other route is connected to the spare fire-fighting tank through the spare fresh water electric ball valve. The output end of the high-pressure mixed gas source is connected to the No. 2 main pipe. The No. 2 main pipe branches into two routes, one route is connected to the fire-fighting tank through the high-pressure gas electric ball valve, and the other route is connected to the spare fire-fighting tank through the spare high-pressure gas electric ball valve.

[0008] It also includes a living cabin, a fire sprinkler is installed on the top of the living cabin,

[0009] The middle part of the connecting pipe between the fire fighting tank and the spare fire fighting tank is connected to the fire sprinkler through a pipe, and the pipe is connected in series with a blow-through drain valve, a manual ball valve, a No. 2 check valve and a pressure switch. The interior of the living cabin is equipped with a fire sprinkler, a smoke detector, an audible and visual alarm, a local release button box and a flame detector;

[0010] It also includes a main control box that provides electrical signals.

[0011] Its further technical solution is:

[0012] The connecting pipe between the fire fighting tank and the spare fire fighting tank is respectively equipped with a fire fighting tank water outlet electric ball valve and a spare fire fighting tank water outlet electric ball valve.

[0013] The control ports of the fresh water pump, fresh water electric ball valve, high pressure gas electric ball valve, fire tank pressure switch, fire tank exhaust electric ball valve, high water level sensor, low water level sensor, fire tank water outlet electric ball valve, spare fresh water electric ball valve, spare high pressure gas electric ball valve, spare fire tank pressure switch, spare fire tank exhaust electric ball valve, spare high water level sensor, spare low water level sensor, spare fire tank water outlet electric ball valve, pressure switch, smoke probe, sound and light alarm, local release button box and flame probe are respectively connected to the main control box through electrical lines.

[0014] The fresh water electric ball valve, high pressure gas electric ball valve, fire tank exhaust electric ball valve, fire tank water outlet electric ball valve, spare fresh water electric ball valve, spare high pressure gas electric ball valve, spare fire tank exhaust electric ball valve, spare fire tank water outlet electric ball valve, and blow-through drainage valve are in a normally open state.

[0015] The manual ball valve is in a normally closed state.

[0016] The high-pressure mixed gas source is a helium-oxygen mixed gas with the same proportion as the cabin gas, and the pressure of the high-pressure mixed gas source is 2 to 3 times the maximum working pressure of the saturation diving system.

[0017] The beneficial effects of the present invention are as follows:

[0018] The present invention has a compact and reasonable structure and is easy to operate. By real-time monitoring of the cabin and fire extinguisher pressures, the input speed of the high-pressure gas source is controlled during fire extinguishing to ensure that the fire extinguisher pressure is always 0.1MPa to 0.5MPa higher than the cabin pressure, thereby meeting the fire extinguishing needs when the cabin pressure changes over a large range.

[0019] The present invention designs two fire-fighting tanks to provide a stable water source for cabin fire extinguishing, and can serve as a backup when one fire-fighting tank fails.

[0020] The present invention sets a helium-oxygen mixture with the same proportion as the cabin gas as the driving gas. Even if the low liquid level sensor or the solenoid valve fails and the fire tank gas enters the cabin, the cabin gas ratio will not be significantly changed, avoiding harm to the diver's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a partial view (1) of the present invention.

[0023] Figure 3 It is a partial view (two) of the present invention.

[0024] Among them: 1. Fresh water source; 2. High-pressure mixed gas source; 3. Fresh water pump; 4. No. 1 check valve; 5. Fresh water electric ball valve; 6. High-pressure gas electric ball valve; 7. Fire tank pressure switch; 8. Fire tank safety valve; 9. Fire tank exhaust electric ball valve; 10. High water level sensor; 11. Fire tank; 12. Low water level sensor; 13. Main control box; 14. Fire tank outlet electric ball valve; 15. Spare fresh water electric ball valve; 16. Spare high-pressure gas electric ball valve; 17. Spare fire tank Pressure switch; 18. Spare fire tank safety valve; 19. Spare fire tank exhaust electric ball valve; 20. Spare high water level sensor; 21. Spare fire tank; 22. Spare low water level sensor; 23. Spare fire tank water outlet electric ball valve; 24. Blow-through drain valve; 25. Manual ball valve; 26. No. 2 check valve; 27. Pressure switch; 28. Fire sprinkler; 29. ​​Smoke detector; 30. Sound and light alarm; 31. Local release button box; 32. Flame detector; 33. Living cabin. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] like Figure 1-Figure 3 As shown, the deep saturation diving fire fighting system of this embodiment includes a fire fighting tank 11 and a spare fire fighting tank 21 arranged in parallel and connected to each other. The fire fighting tank 11 is equipped with a fire fighting tank pressure switch 7, a fire fighting tank safety valve 8, a fire fighting tank exhaust electric ball valve 9, a high water level sensor 10 and a low water level sensor 12. The spare fire fighting tank 21 is equipped with a spare fire fighting tank pressure switch 17, a spare fire fighting tank safety valve 18, a spare fire fighting tank exhaust electric ball valve 19, a spare high water level sensor 20, and a spare low water level sensor 22. A water source 1 and a high-pressure mixed gas source 2, the output end of the fresh water source 1 is connected to the No. 1 main pipe, on which a fresh water pump 3 and a No. 1 check valve 4 are installed in series, and the No. 1 main pipe is branched into two routes, one of which is connected to the fire tank 11 through the fresh water electric ball valve 5, and the other is connected to the standby fire tank 21 through the standby fresh water electric ball valve 15; the output end of the high-pressure mixed gas source 2 is connected to the No. 2 main pipe, which is branched into two routes, one of which is connected to the fire tank 11 through the high-pressure gas electric ball valve 6, and the other is connected to the standby fire tank 21 through the standby high-pressure gas electric ball valve 16;

[0027] It also includes a living cabin 33, on the top of which a fire sprinkler 28 is installed.

[0028] The middle of the connecting pipe between the fire fighting tank 11 and the backup fire fighting tank 21 is connected to a fire sprinkler 28 via a pipe. The pipe is connected in series with a blow-through drain valve 24, a manual ball valve 25, a No. 2 check valve 26, and a pressure switch 27. The interior of the living cabin 33 is equipped with a fire sprinkler 28, a smoke detector 29, an audible and visual alarm 30, a local release button box 31, and a flame detector 32.

[0029] It also includes a main control box 13 that provides electrical signals.

[0030] The connecting pipe between the fire fighting tank 11 and the backup fire fighting tank 21 is respectively installed with a fire fighting tank water outlet electric ball valve 14 and a backup fire fighting tank water outlet electric ball valve 23.

[0031] The control ports of the fresh water pump 3, fresh water electric ball valve 5, high-pressure gas electric ball valve 6, fire tank pressure switch 7, fire tank exhaust electric ball valve 9, high water level sensor 10, low water level sensor 12, fire tank water outlet electric ball valve 14, spare fresh water electric ball valve 15, spare high-pressure gas electric ball valve 16, spare fire tank pressure switch 17, spare fire tank exhaust electric ball valve 19, spare high water level sensor 20, spare low water level sensor 22, spare fire tank water outlet electric ball valve 23, pressure switch 27, smoke probe 29, sound and light alarm 30, local release button box 31 and flame probe 32 are respectively connected to the main control box 13 through electrical lines.

[0032] The fresh water electric ball valve 5, the high pressure gas electric ball valve 6, the fire tank exhaust electric ball valve 9, the fire tank water outlet electric ball valve 14, the spare fresh water electric ball valve 15, the spare high pressure gas electric ball valve 16, the spare fire tank exhaust electric ball valve 19, the spare fire tank water outlet electric ball valve 23, and the blow-through drain valve 24 are in the normally open state.

[0033] The manual ball valve 25 is in a normally closed state.

[0034] The high-pressure mixed gas source 2 is a helium-oxygen mixed gas with the same proportion as the cabin gas, and the pressure of the high-pressure mixed gas source 2 is 2 to 3 times the maximum working pressure of the saturation diving system.

[0035] like Figure 1-Figure 3 As shown, the specific structure and function of the present invention are as follows:

[0036] It mainly includes a fresh water source 1, a high-pressure mixed gas source 2, a fire tank 11, a spare fire tank 21, a main control box 13 and a living cabin 33, etc.

[0037] Among them, the fresh water source 1 is connected to the fire tank 11 through the fresh water pump 3, the No. 1 check valve 4, and the fresh water electric ball valve 5.

[0038] The high-pressure mixed gas source 2 is connected to the fire tank 11 through a high-pressure gas electric ball valve 6 .

[0039] The fire tank 11 is equipped with a fire tank pressure switch 7, a fire tank safety valve 8, a fire tank exhaust electric ball valve 9, a high water level sensor 10, and a low water level sensor 12.

[0040] The fire tank 11 is connected to the fire sprinkler 28 in the living cabin 33 through the fire tank water outlet electric ball valve 14, manual ball valve 25, and No. 2 check valve 26. A blow-through drain valve 24 and a pressure switch 27 are also installed on this pipeline.

[0041] The living cabin 33 is equipped with a fire sprinkler 28, a smoke detector 29, an audible and visual alarm 30, an on-site release button box 31, and a flame detector 32.

[0042] The spare fire tank 21 and the components connected to it (spare fresh water electric ball valve 15, spare high-pressure gas electric ball valve 16, spare fire tank pressure switch 17, spare fire tank safety valve 18, spare fire tank exhaust electric ball valve 19, spare high water level sensor 20, spare low water level sensor 22, spare fire tank water outlet electric ball valve 23) are consistent with the principles of the fire tank 11.

[0043] The control ports of the fresh water pump 3, fresh water electric ball valve 5, high-pressure gas electric ball valve 6, fire tank pressure switch 7, fire tank exhaust electric ball valve 9, high water level sensor 10, low water level sensor 12, fire tank water outlet electric ball valve 14, spare fresh water electric ball valve 15, spare high-pressure gas electric ball valve 16, spare fire tank pressure switch 17, spare fire tank exhaust electric ball valve 19, spare high water level sensor 20, spare low water level sensor 22, spare fire tank water outlet electric ball valve 23, pressure switch 27, smoke probe 29, sound and light alarm 30, local release button box 31, and flame probe 32 are respectively connected to the main control box 13 through electrical lines.

[0044] The fresh water electric ball valve 5, the high-pressure gas electric ball valve 6, the fire tank exhaust electric ball valve 9, the fire tank water outlet electric ball valve 14, the spare fresh water electric ball valve 15, the spare high-pressure gas electric ball valve 16, the spare fire tank exhaust electric ball valve 19, the spare fire tank water outlet electric ball valve 23, and the blow-through drain valve 24 are in the normally open state; the manual ball valve 25 is in the normally closed state.

[0045] The design of the fire tank safety valve 8 and the spare fire tank safety valve 18 can ensure the safety of the fire tank; the design of the blow-through drain valve 24 and the manual ball valve 25 can test the function of the front-end fire protection components.

[0046] The high-pressure mixed gas source 2 is a helium-oxygen mixed gas with the same proportion as the cabin gas, and its pressure is 2 to 3 times the maximum working pressure of the saturation diving system. If the maximum working pressure of the saturation diving system is 10 MPa, the pressure of the high-pressure mixed gas source 2 is 20 to 30 MPa.

[0047] In actual work process:

[0048] Real-time monitoring of cabin fires. When a fire occurs, smoke detectors 29 and flame detectors 32 receive fire information and transmit it to the main control box 13, which then controls the audible and visual alarm 30 to sound an audible and visual alarm. If the smoke detectors 29 and flame detectors 32 fail to sound an alarm in time, cabin personnel can manually sound an alarm by releasing the button box 31 locally, which transmits the alarm information to the main control box 13.

[0049] Upon receiving the alarm, the main control box 13 opens the high-pressure gas electric ball valve 6, allowing the gas from the high-pressure mixed gas source 2 to enter the fire tank 11. Based on the pressure information from the fire tank pressure switch 7 and pressure switch 27, the high-pressure gas electric ball valve 6 is activated and deactivated in real time, raising the internal pressure of the fire tank 11 from atmospheric pressure to 0.1 MPa to 0.5 MPa higher than the pressure in the living cabin 33. The fire tank water outlet electric ball valve 14 is then opened, spraying water from the fire sprinkler 28 to extinguish the fire. During the fire-fighting process, high-pressure gas is replenished in real time to ensure the required pressure is met.

[0050] Regardless of the pressure range of the living cabin 33, the pressure in the fire tank 11 can be controlled to be 0.1MPa to 0.5MPa higher than the pressure of the living cabin 33, thereby meeting the fire fighting needs when the pressure changes over a large range.

[0051] After the fire is extinguished, or if the low-water level sensor 12 senses the fire tank water level has reached its lowest point, the main control box 13 controls the high-pressure gas electric ball valve 6 and the fire tank water outlet electric ball valve 14 to close. It then opens the fire tank exhaust electric ball valve 9 to discharge the high-pressure gas in the fire tank 11, restoring the fire tank pressure to normal. It then opens the fresh water electric ball valve 5 and starts the fresh water pump 3 to replenish the fire tank. When the high-water level sensor 10 senses the water level has reached its highest point, it closes the fire tank exhaust electric ball valve 9 and the fresh water electric ball valve 5, and starts the fresh water pump 3.

[0052] The use method of the spare fire tank 21 and its pipeline valves is the same as that of the fire tank 11. When the fire tank 11 fails or all its fresh water is used up, the spare fire tank 21 can keep the fire protection system working.

[0053] The present invention sets a helium-oxygen mixture with the same proportion as the cabin gas as the driving gas. Even if the low liquid level sensor or the solenoid valve fails and the fire tank gas enters the cabin, the cabin gas ratio will not be significantly changed, avoiding harm to the diver's body.

[0054] 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 modifications may be made within the scope of protection of the present invention.

Claims

1. A deep-depth saturation diving firefighting system, characterized by: The invention comprises a fire fighting tank (11) and a standby fire fighting tank (21) which are arranged in parallel and communicated with each other, wherein the fire fighting tank (11) is provided with a fire fighting tank pressure switch (7), a fire fighting tank safety valve (8), a fire fighting tank exhaust electric ball valve (9), a high water level sensor (10) and a low water level sensor (12), and the standby fire fighting tank (21) is provided with a standby fire fighting tank pressure switch (17), a standby fire fighting tank safety valve (18), a standby fire fighting tank exhaust electric ball valve (19), a standby high water level sensor (20) and a standby low water level sensor (22), and further comprises a fresh water source (1) and a high pressure mixing The gas source (2) and the output end of the fresh water source (1) are connected to the No. 1 main pipe, a fresh water pump (3) and a No. 1 check valve (4) are installed in series on the No. 1 main pipe, and the No. 1 main pipe is branched into two routes, one of which is connected to the fire tank (11) through the fresh water electric ball valve (5), and the other is connected to the standby fire tank (21) through the standby fresh water electric ball valve (15); the output end of the high-pressure mixed gas source (2) is connected to the No. 2 main pipe, and the No. 2 main pipe is branched into two routes, one of which is connected to the fire tank (11) through the high-pressure gas electric ball valve (6), and the other is connected to the standby fire tank (21) through the standby high-pressure gas electric ball valve (16); It also includes a living cabin (33), the top of which is equipped with a fire sprinkler (28). The middle part of the connecting pipe between the fire fighting tank (11) and the spare fire fighting tank (21) is connected to the fire sprinkler (28) through a pipe, and the pipe is sequentially connected in series with a blow-through drain valve (24), a manual ball valve (25), a second check valve (26) and a pressure switch (27). The interior of the living cabin (33) is equipped with a fire sprinkler (28), a smoke detector (29), an audible and visual alarm (30), a local release button box (31) and a flame detector (32); and also includes a main control box (13) that provides electrical signals; The high-pressure mixed gas source (2) is a helium-oxygen mixed gas with the same proportion as the cabin gas, and the pressure of the high-pressure mixed gas source (2) is 2 to 3 times the maximum working pressure of the saturation diving system.

2. A deep-depth saturation diving firefighting system according to claim 1, characterized in that: A fire tank water outlet electric ball valve (14) and a spare fire tank water outlet electric ball valve (23) are respectively installed on the connecting pipe between the fire tank (11) and the spare fire tank (21).

3. A deep-depth saturation diving firefighting system according to claim 2, characterized in that: Control ports of the fresh water pump (3), the fresh water electric ball valve (5), the high-pressure gas electric ball valve (6), the fire tank pressure switch (7), the fire tank exhaust electric ball valve (9), the high water level sensor (10), the low water level sensor (12), the fire tank water outlet electric ball valve (14), the spare fresh water electric ball valve (15), the spare high-pressure gas electric ball valve (16), the spare fire tank pressure switch (17), the spare fire tank exhaust electric ball valve (19), the spare high water level sensor (20), the spare low water level sensor (22), the spare fire tank water outlet electric ball valve (23), the pressure switch (27), the smoke detector (29), the sound and light alarm (30), the local release button box (31) and the flame detector (32) are respectively connected to the main control box (13) through electrical lines.

4. A deep-depth saturation diving firefighting system according to claim 3, characterized in that: The fresh water electric ball valve (5), the high pressure gas electric ball valve (6), the fire tank exhaust electric ball valve (9), the fire tank water outlet electric ball valve (14), the spare fresh water electric ball valve (15), the spare high pressure gas electric ball valve (16), the spare fire tank exhaust electric ball valve (19), the spare fire tank water outlet electric ball valve (23), and the blow-through drain valve (24) are in a normally open state.

5. A deep-depth saturation diving firefighting system according to claim 4, characterized in that: The manual ball valve (25) is in a normally closed state.

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