Compressed air foam extinguishing system for extra-high voltage converter stations

Abstract

The application discloses a compressed air foam fire extinguishing system for an extra-high voltage converter station, belongs to the field of fire extinguishing of an extra-high voltage converter station, and discloses a compressed air foam fire extinguishing system for an extra-high voltage converter station, which comprises a fire pool, a foam liquid storage tank and a gas-liquid mixing tank, a water inlet pipe is connected to the fire pool, a foam pipe is connected to the foam liquid storage tank, a foam filter is arranged on the foam pipe, the foam liquid storage tank and the fire pool are connected to the gas-liquid mixing tank through pipelines, a fire pump and a fire electromagnetic valve are arranged on the water inlet pipe, and a mixing assembly is arranged in the gas-liquid mixing tank. After a large amount of foam is used for fire extinguishing, insulating oil is introduced into the gas-liquid mixing tank through the spray fort, and then the insulating liquid is sprayed again to flush the large amount of covered foam, so that the foam can be quickly cleaned, the fire loss can be quickly reacted, the device can be repaired and replaced, and power supply can be restored as soon as possible, thereby facilitating the normal life and production of residents and factories.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing in ultra-high voltage converter stations, and more specifically, to a compressed air foam fire extinguishing system for ultra-high voltage converter stations. Background Technology

[0002] In recent years, explosive fires have frequently occurred in locations such as power transformers, highway tunnels, and petrochemical oil terminals in my country. Large oil-immersed power transformers, in particular, are highly susceptible to both splash fires and three-dimensional flowing fires once a fire breaks out. Traditional sprinkler systems release extinguishing agents in a dispersed manner with low intensity and are unable to suppress explosive splash fires. Only fixed fire monitor systems, which concentrate and spray extinguishing agents at a high intensity onto the fire source, can effectively extinguish the fire at its source and prevent its spread. Ordinary water cannon systems, however, have long spraying times, high water consumption, and high energy consumption, and their extinguishing efficiency is relatively low, making it difficult to quickly extinguish fires and prevent their spread. Therefore, combining advanced and efficient extinguishing agents with fire monitor system technology is the best solution to address the fire protection challenges in these locations.

[0003] A search of the publication CN114534139A reveals a fixed compressed air foam fire extinguishing system and control method for ultra-high voltage converter stations, comprising a CAFS linkage control system, a foam generating device, a foam generating device controller, a mobile fire-fighting robot interface valve, a fire-fighting foam gun interface valve, a zone selection valve, and several ultra-high voltage converter station zones. This invention uses the CAFS linkage control system to collect the on / off signals of each valve and determines the control signal for the foam generating device based on these signals. This enables automatic and real-time adjustment of the foam flow rate of the foam generating device, improving the system's intelligence and operational stability.

[0004] Although existing technologies control foam generation on-site through foam generating devices and control systems, after foam is sprayed during a fire, a large amount of residual foam covers electrical components. If not dealt with in time, it is difficult to repair and use them. Moreover, it cannot be washed with water. The usual method is to wait for it to dry and then wipe it manually, which is very troublesome. Therefore, there is an urgent need to remove the large amount of foam after extinguishing a fire. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the present invention aims to provide a compressed air foam fire extinguishing system for ultra-high voltage converter stations. After extinguishing the fire with a large amount of foam, insulating oil is introduced and the insulating liquid is sprayed again through a jet gun to flush the large amount of foam covering the fire, thereby achieving rapid cleaning, quick response to fire damage, repair and replacement of components, and restoration of power supply as soon as possible, facilitating the normal life and production of residents and factories.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A compressed air foam fire extinguishing system for ultra-high voltage converter stations includes a fire water tank, a foam liquid storage tank, and a gas-liquid mixing tank. The fire water tank is connected to an inlet pipe. The foam liquid storage tank is connected to a foam pipe and a foam filter on the foam pipe. The foam liquid storage tank and the fire water tank are connected to the gas-liquid mixing tank via pipelines. One end of the gas-liquid mixing tank is connected to a spray nozzle. The spray nozzle is electrically connected to a controller. A fire pump and a fire solenoid valve are installed on the inlet pipe. A mixing assembly is installed inside the gas-liquid mixing tank.

[0010] Furthermore, the mixing assembly includes a mixing drum and multiple mixing vents on the mixing drum. One end of the mixing drum is welded to a rotating frame, and the other end is connected to a rotating motor. A connecting main pipe is movably connected to the rotating frame, and the connecting main pipe is connected to the water inlet pipe.

[0011] Furthermore, the bottom of the gas-liquid mixing tank is threadedly connected to a discharge pipe, one end of which is connected to the jet gun platform.

[0012] Furthermore, the mixing drum is a hollow cylindrical structure, and the rotating frame is a cross-shaped structure, with all four ends welded to the inner wall of the mixing drum.

[0013] Furthermore, it also includes an insulating liquid storage tank and an air compressor. The insulating liquid storage tank is equipped with a first insulating liquid pipe and a second insulating liquid pipe. Both the first and second insulating liquid pipes are equipped with electromagnetic valves. One end of the first insulating liquid pipe is connected to the spray gun platform. An insulating liquid pump is connected between the second and first insulating liquid pipes and the insulating liquid storage tank.

[0014] Furthermore, one end of the second insulating liquid pipe is connected to the gas-liquid mixing tank, and an air pipe with one end connected to the gas-liquid mixing tank is connected to the air compressor. An air filter is also installed on the air pipe, and the air pipe is connected to the main connecting pipe.

[0015] Furthermore, the second insulating liquid pipe is threaded to the top of the gas-liquid mixing tank.

[0016] Furthermore, the insulating liquid storage tank is filled with synthetic insulating oil or vegetable insulating oil, wherein the synthetic insulating oil is red and the vegetable insulating oil is green.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of this invention are:

[0019] (1) This solution can improve the mixing effect during gas-liquid mixing by using a rotating mixing drum, and the water and foam introduced can be mixed and foamed through the mixing air holes on the mixing drum; the discharge pipe connected to the bottom of the gas-liquid mixing tank can be used to discharge the material after mixing by gravity, which is more convenient.

[0020] (2) When the distance is close and the foam is small, the first insulating liquid pipe can be directly connected to the spray gun to complete the spraying directly. When the distance is far and there is a lot of foam, the second insulating liquid pipe can be used to mix with the gas to complete the spraying. There are multiple options, which is very convenient.

[0021] (3) This solution can improve the spray fire extinguishing effect by adding air when releasing foam through the connected air compressor. It can also add air to mix the insulating liquid to improve the cleaning effect. The second insulating liquid pipe set at the top can flush the mixing drum inside the gas-liquid mixing tank when the insulating oil falls, thus improving the flushing effect.

[0022] (4) The insulating oil in this solution can spray the foam formed after fire extinguishing, thereby cleaning the metal parts on the cable and exposed parts, improving the maintenance effect. The color-coded insulating oil can be clearly identified, improving the safety effect and avoiding the problem of damage to electrical components caused by mistakenly thinking it is water cleaning. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the mixing drum of the present invention;

[0025] Figure 3 This is a schematic diagram of the workflow of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1. Fire water tank; 2. Foam liquid storage tank; 3. Insulating liquid storage tank; 4. Gas-liquid mixing tank; 5. Spray cannon; 6. Controller console; 7. Air compressor; 8. Foam filter; 9. Fire pump; 10. Fire solenoid valve; 11. Air filter; 12. Insulating liquid pump; 13. Mixing drum; 14. Connecting main pipe; 15. Rotating motor; 16. Air pipe; 17. Mixing air port; 18. Rotating frame; 19. Discharge pipe; 20. Water inlet pipe; 21. Foam pipe; 22. First insulating liquid pipe; 23. Second insulating liquid pipe. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] Please see Figure 1-3 This compressed air foam fire extinguishing system, used in ultra-high voltage converter stations, includes a fire water tank 1, a foam liquid storage tank 2, and a gas-liquid mixing tank 4. The fire water tank 1 is connected to an inlet pipe 20. The foam liquid storage tank 2 is connected to a foam pipe 21 and a foam filter 8 on the foam pipe 21. The foam liquid storage tank 2 and the fire water tank 1 are connected to the gas-liquid mixing tank 4 via pipelines. One end of the gas-liquid mixing tank 4 is connected to a spray nozzle 5. The spray nozzle 5 is electrically connected to a controller 6. A fire pump 9 and a fire solenoid valve 10 are installed on the inlet pipe 20. A mixing component is installed inside the gas-liquid mixing tank 4. After extinguishing the fire with a large amount of foam, insulating oil is introduced and the insulating liquid is again sprayed through the spray nozzle 5 to flush away the large amount of foam covering the fire, thereby achieving rapid cleaning, quick response to fire damage, repair and replacement of components, and early restoration of power supply, facilitating the normal life and production of residents and factories.

[0031] Please see Figure 2 The mixing assembly includes a mixing drum 13 and multiple mixing vents 17 on the mixing drum 13. A rotating frame 18 is welded to one end of the mixing drum 13, and a rotating motor 15 is connected to the other end. A connecting main pipe 14 is movably connected to the rotating frame 18. The connecting main pipe 14 is connected to the water inlet pipe 20, and an air pipe 16 is connected to the connecting main pipe 14. The rotating mixing drum 13 can improve the mixing effect during gas-liquid mixing, and the water and foam introduced can be mixed and discharged through the mixing vents 17 on the mixing drum 13. The discharge pipe 19 connected to the bottom of the gas-liquid mixing tank 4 can discharge the mixture by gravity, which is convenient.

[0032] Please see Figure 1 and Figure 3The bottom of the gas-liquid mixing tank 4 is threadedly connected to a discharge pipe 19, one end of which is connected to the spray gun 5. The mixing drum 13 is a hollow cylindrical structure, and the rotating frame 18 is a cross-shaped structure, with all four ends welded to the inner wall of the mixing drum 13. It also includes an insulating liquid storage tank 3 and an air compressor 7. The insulating liquid storage tank 3 is equipped with a first insulating liquid pipe 22 and a second insulating liquid pipe 23. Both the first and second insulating liquid pipes 22 and 23 are equipped with electromagnetic valves. When the distance is short and the foam is small, the first insulating liquid pipe 22 can be directly connected to the spray gun 5 for direct spraying. When the distance is long and the foam is large, the second insulating liquid pipe 23 can be used to mix the gas and complete the spraying. This provides multiple options and is very convenient. One end of the first insulating liquid pipe 22 is connected to the spray gun 5, and an insulating liquid pump 12 is connected between the second insulating liquid pipe 23, the first insulating liquid pipe 22, and the insulating liquid storage tank 3. One end of the second insulating liquid pipe 23 is connected to the gas-liquid mixing tank. 4. An air compressor 7 is connected to an air pipe 16, one end of which is connected to the gas-liquid mixing tank 4. An air filter 11 is also installed on the air pipe 16. The air compressor 7 can add air when releasing foam to improve the spray extinguishing effect. It can also add air to mix the insulating liquid to improve the cleaning effect. The second insulating liquid pipe 23 set at the top can flush the mixing drum 13 inside the gas-liquid mixing tank 4 when the insulating oil falls, improving the flushing effect. The second insulating liquid pipe 23 is threaded to the top of the gas-liquid mixing tank 4. The insulating liquid storage tank 3 is filled with synthetic insulating oil or vegetable insulating oil. Synthetic insulating oil is red and vegetable insulating oil is green. The insulating oil can spray the foam formed after extinguishing the fire, thereby cleaning the cables and exposed metal parts, improving the maintenance effect. The color-coded insulating oil can be clearly identified, improving the safety effect and avoiding the problem of mistakenly thinking it is water cleaning and damaging electrical components.

[0033] Specifically, during firefighting, the fire pump 9 is started, and the water from the fire water tank 1 is piped into the gas-liquid mixing tank 4. Simultaneously, the pump on the foam pipe 21 is started, and the foam from the foam liquid storage tank 2 is introduced into the gas-liquid mixing tank 4. At this time, the rotating motor 15 is started. The rotating motor 15 is keyed to the mixing drum 13, and the mixing drum 13 rotates. The introduced mixture enters the connecting main pipe 14, which is movably connected to the mixing drum 13. Thus, the mixture enters the mixing drum 13. The air compressor 7 is then started. After being filtered by the air filter 11, the air compressor 7 introduces gas into the connecting main pipe 14. Under the action of air pressure, the mixture is mixed by the rotation of the mixing drum 13 and then discharged from the mixing air hole 17 on the mixing drum 13. Under the action of gravity, it falls into the bottom of the gas-liquid mixing tank 4. At this time, the spray gun 5 is activated, and the mixture is sprayed out under the action of air pressure. The controller 6 is electrically connected to each electrical component through wires to control the mixture. After the fire is extinguished, the insulating liquid pump 12 is activated to pump the insulating liquid in the insulating liquid storage tank 3 into the spray gun 5 through the first insulating liquid pipe 22 for spraying, or into the gas-liquid mixing tank 4 through the second insulating liquid pipe 23 to clean the gas-liquid mixing tank 4 and add air at the same time, thereby achieving a better spraying effect.

[0034] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A compressed air foam fire extinguishing system for ultra-high voltage converter stations, comprising a fire water tank (1), characterized in that: It also includes a foam liquid storage tank (2) and a gas-liquid mixing tank (4). The fire water tank (1) is connected to an inlet pipe (20). The foam liquid storage tank (2) is connected to a foam pipe (21) and a foam filter (8) on the foam pipe (21). The foam liquid storage tank (2) and the fire water tank (1) are connected to the gas-liquid mixing tank (4) through a pipe. One end of the gas-liquid mixing tank (4) is connected to a spray gun (5). The spray gun (5) is electrically connected to a controller (6). The inlet pipe (20) is equipped with a fire pump (9) and a fire solenoid valve (10). The gas-liquid mixing tank (4) is equipped with a mixing component. The mixing assembly includes a mixing drum (13) and a plurality of mixing air holes (17) opened on the mixing drum (13). A rotating frame (18) is welded to one end of the mixing drum (13), and a rotating motor (15) is connected to the other end. A connecting main pipe (14) is movably connected to the rotating frame (18), and the connecting main pipe (14) is connected to the water inlet pipe (20). The mixing drum (13) is a hollow cylindrical structure, and the rotating frame (18) is a cross-shaped structure, with all four ends welded to the inner wall of the mixing drum (13). It also includes an insulating liquid storage tank (3) and an air compressor (7). The insulating liquid storage tank (3) is provided with a first insulating liquid pipe (22) and a second insulating liquid pipe (23). Both the first insulating liquid pipe (22) and the second insulating liquid pipe (23) are provided with electromagnetic valves. One end of the first insulating liquid pipe (22) is connected to the jet gun turret (5). An insulating liquid pump (12) is provided between the second insulating liquid pipe (23) and the first insulating liquid pipe (22) and the insulating liquid storage tank (3). One end of the second insulating liquid pipe (23) is connected to the gas-liquid mixing tank (4), and the air compressor (7) is connected to an air pipe (16) with one end connected to the gas-liquid mixing tank (4). An air filter (11) is also installed on the air pipe (16), and the air pipe (16) is connected to the connecting main pipe (14).

2. The compressed air foam fire extinguishing system for ultra-high voltage converter stations according to claim 1, characterized in that: The bottom of the gas-liquid mixing tank (4) is threadedly connected to a discharge pipe (19), one end of which is connected to the jet gun turret (5).

3. The compressed air foam fire extinguishing system for ultra-high voltage converter stations according to claim 1, characterized in that: The second insulating liquid pipe (23) is threaded to the top of the gas-liquid mixing tank (4).

4. The compressed air foam fire extinguishing system for ultra-high voltage converter stations according to claim 1, characterized in that: The insulating liquid storage tank (3) is filled with synthetic insulating oil or plant-based insulating oil. The synthetic insulating oil is red in color, and the plant-based insulating oil is green in color.

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