Fixed compressed air foam fire extinguishing device for transformer substation

Abstract

The fixed compressed air foam fire extinguishing device comprises a square cabin, a liquid outlet is formed in the lower right corner of the surface of the front side of the square cabin, an internal assembly is arranged in the square cabin, and an external assembly is arranged outside the square cabin. The internal assembly comprises a water pump, a foam pump, a heat exchanger, a liquid-liquid mixer, a gas-liquid mixer, a foam stock solution buffer chamber, a first electric three-way ball valve, a second electric three-way ball valve and an internal pipeline group, and the external assembly comprises a water tank, a foam stock solution tank and an air compressor. The internal pipeline group comprises a water pump water return pipe, a water pump water inlet pipe, a liquid outlet pipe, a foam pump liquid return pipe, a foam liquid inlet pipe, an air inlet pipe, a water conveying pipe, a foam liquid conveying pipe and a foam liquid return branch pipe; according to the device, the water tank, the foam stock solution tank and the air compressor are arranged externally, the size of the square cabin can be reduced, the volumes of the water tank and the foam stock solution tank can be increased according to requirements after the water tank, the foam stock solution tank and the air compressor are arranged externally, the air compressor can also be adjusted according to different foaming multiple requirements, the layout is more flexible after the air compressor is arranged externally, and the applicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting, in particular to a fixed compressed air foam fire extinguishing device for a transformer substation. Background Art

[0002] Substation refers to the place in the power system where voltage and current are transformed, electric energy is received and distributed. The substation in the power plant is a step-up substation, whose function is to step up the electric energy generated by the generator and feed it into the high-voltage power grid. As an indispensable part of the power system, the substation has developed together with the power system for more than 100 years. During the development process of more than 100 years, the substation has undergone tremendous changes in construction sites, voltage levels, equipment conditions, etc. On the construction site of the substation, indoor substations and some underground substations have gradually appeared from the original all-open outdoor substations. The area occupied by the substation has been reduced a lot compared with the original open outdoor substations. For the development of substations, fire safety issues are particularly important.

[0003] At present, the core components of domestic compressed air foam fire extinguishing devices mainly include fire water pumps, foam pumps and air compressors. Long-term operation is prone to failure. If a failure occurs, the fire extinguishing operation can only be terminated for maintenance, which will undoubtedly delay the fire extinguishing operation and cause greater losses to personal safety or property. In addition, the water tank, foam tank and air compressor occupy a large space, resulting in a large device size. If the device size is too small, the water tank and foam tank will be small, which will affect the durability of fire extinguishing and greatly reduce the fire extinguishing performance. For this reason, we design a fixed compressed air foam fire extinguishing device for substations to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a fixed compressed air foam fire extinguishing device for a substation to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A fixed compressed air foam fire extinguishing device for a substation comprises a square cabin, a front surface of the square cabin is movably provided with a double-leaf door, a lower right corner of the front surface of the square cabin is provided with a liquid outlet, a control cabinet is provided on the left side of the square cabin, an internal component is provided in the square cabin and on the right side of the control cabinet, and an external component is provided outside the square cabin, the internal component comprises a water pump, a foam pump, a heat exchanger, a liquid-liquid mixer, a gas-liquid mixer, a foam stock liquid buffer chamber, a first electric three-way ball valve, a second electric three-way ball valve and an internal pipeline group, the external component comprises a water tank, a foam stock liquid tank and an air compressor, the internal pipeline group comprises a water pump return pipe, a water pump water inlet pipe, a liquid outlet pipe, a foam pump return pipe, a foam inlet pipe, an air inlet pipe, a water delivery pipe, a foam delivery pipe and a foam return branch pipe, the A water pump return water interface, a water pump water inlet interface, a foam pump liquid return interface, a foam liquid inlet interface and an air inlet interface are provided at the bottom of the rear side wall of the cabin. Two water pumps are provided and are horizontally installed side by side on the bottom wall of the cabin. The water inlet end of the water pump faces inward and is connected to the water pump water inlet pipe, and the other end of the water pump water inlet pipe is connected to the water pump water inlet interface. The water outlet end of the water pump is connected to the water delivery pipe through a first electric three-way ball valve, and the other end of the water delivery pipe is connected to a liquid-liquid mixer, and the other end of the liquid-liquid mixer is connected to a gas-liquid mixer through a connecting pipe I, and the other end of the gas-liquid mixer is connected to the liquid outlet pipe through a spoiler, and the other end of the liquid outlet pipe is connected to the liquid outlet, the side interface of the first electric three-way ball valve is connected to the water pump return water pipe, and the other end of the water pump return water pipe is connected to the water pump return water interface.

[0007] As a preferred solution of the utility model: the foam stock liquid cache chamber is fixedly installed on the bottom wall of the cabin, one end of the foam liquid inlet pipe is connected to the foam stock liquid cache chamber, and the other end is connected to the foam liquid inlet interface, the other side of the foam stock liquid cache chamber is connected to the liquid inlet end of the foam pump through the connecting pipe II, the liquid outlet end of the foam pump is connected to the foam infusion pipe, the other end of the foam infusion pipe is connected to the liquid-liquid mixer, a second electric three-way ball valve is provided on the foam infusion pipe, the side interface of the second electric three-way ball valve is connected to the foam return branch pipe, the other end of the foam return branch pipe is connected to the foam pump return pipe, and the other end of the foam pump return pipe is connected to the foam pump return interface.

[0008] As a further preferred embodiment of the present invention: one end of the air intake pipe is connected to the air intake interface and the other end is connected to the gas-liquid mixer. A heat exchanger and a pneumatic angle seat valve are provided on the air intake pipe. Two air compressors are provided, and the air compressors are connected to the air intake interface through external pipelines.

[0009] As a further preferred solution of the utility model: a manual gate valve is provided on the water delivery pipe.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. This device sets up external components outside the shelter separately, that is, the water tank, foam liquid tank and air compressor are arranged externally, which can reduce the volume of the shelter. At the same time, the volume of the water tank and foam liquid tank can be increased according to needs after being placed externally, and the air compressor can also be adjusted according to different foaming multiples, thereby ensuring the fire extinguishing performance of the device. The layout is more flexible and more applicable after being placed externally.

[0012] 2. The water pump and foam pump in this device have the function of inspecting their own pumps respectively, and there are two air compressors, water pumps and foam pumps respectively, and the two air compressors are one backup and one use. This redundant design ensures that when some components in the device fail, the equipment can still work normally, reduce the probability of equipment failure, and improve reliability. Otherwise, once a failure occurs, it will lead to the loss of fire extinguishing function, and the consequences are disastrous. At the same time, the water pump and foam pump have a self-checking function and do not affect the normal use of the device, further improving safety and reliability; this device adopts positive pressure to form foam, which is different from the previous negative pressure liquid suction mixing and air suction foaming. The foam quality is better and the fire extinguishing performance is improved; in addition, this device can adopt two starting methods, automatic or manual, and has higher applicability.

[0013] 3. This device is equipped with instruments in each internal pipeline, which are used to collect corresponding flow information and pressure information, and control the operating status of each pump and air compressor through PID algorithm and control cabinet to achieve a stable mixing ratio and gas-liquid ratio. The parameters can be adjusted according to the different fire extinguishing objects; and the foaming multiple of the generated foam can be set at 6 to 10 times according to the different fire extinguishing objects, with a long effective fire extinguishing time and a fast fire extinguishing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the overall structure of the utility model;

[0015] Figure 2 This is the front view of the internal structure of the central cabin of the utility model;

[0016] Figure 3 It is a top view of the internal structure of the central cabin in the utility model.

[0017] Among them: 1-cabin, 2-control cabinet, 3-water pump, 4-foam pump, 5-liquid-liquid mixer, 6-heat exchanger, 7-pneumatic angle seat valve, 8-gas-liquid mixer, 9-manual gate valve, 10-first electric three-way ball valve, 11-foam stock liquid buffer chamber, 12-turbulator, 13-second electric three-way ball valve, 14-water pump return pipe, 15-water pump inlet pipe, 16-liquid outlet pipe, 17-foam pump return pipe, 18-foam inlet pipe, 19-air inlet pipe, 20-water pipe, 21-foam return branch pipe, 22-foam infusion pipe. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-3 In the embodiment of the utility model, a fixed compressed air foam fire extinguishing device for a substation includes a cabin 1, a double-door is movably provided on the front surface of the cabin 1, a liquid outlet is provided at the lower right corner of the front surface of the cabin 1, a control cabinet 2 is provided on the left side of the cabin 1, an internal component is provided in the cabin 1 and on the right side of the control cabinet, and an external component is provided outside the cabin 1, the internal component includes a water pump 3, a foam pump 4, a heat exchanger 6, a liquid-liquid mixer 5, a gas-liquid mixer 8, a foam stock liquid buffer chamber 11, a first electric three-way ball valve 10, a second electric three-way ball valve 13 and an internal pipeline group, the external component includes a water tank, a foam stock liquid tank and an air compressor, the internal pipeline group includes a water pump return pipe 14, a water pump water inlet pipe 15, a liquid outlet pipe 16, a foam pump return pipe 17, a foam inlet pipe 18, an air inlet pipe 19, a water delivery pipe 20, a foam delivery pipe 22 and a foam return pipe Liquid branch pipe 21, a water pump return water interface, a water pump water inlet interface, a foam pump liquid return interface, a foam liquid inlet interface and an air inlet interface are arranged at the bottom of the rear side wall of the cabin. Two water pumps 3 are arranged and are horizontally installed side by side on the bottom wall of the cabin 1. The water inlet end of the water pump 3 faces inward and is connected to the water pump inlet pipe 15. The other end of the water pump inlet pipe 15 is connected to the water pump inlet interface. The water outlet end of the water pump 3 is connected to the water delivery pipe 20 through the first electric three-way ball valve 10, and the other end of the water delivery pipe 20 is connected to the liquid-liquid mixer 5. The other end of the liquid-liquid mixer 5 is connected to the gas-liquid mixer 8 through the connecting pipe I. The other end of the gas-liquid mixer 8 is connected to the liquid outlet pipe 16 through the spoiler 12, and the other end of the liquid outlet pipe 16 is connected to the liquid outlet. The side interface of the first electric three-way ball valve 10 is connected to the water pump return water pipe 14, and the other end of the water pump return water pipe 14 is connected to the water pump return water interface.

[0020] The foam stock liquid buffer chamber 11 is fixedly installed on the bottom wall of the cabin 1, one end of the foam inlet pipe 18 is connected to the foam stock liquid buffer chamber 11, and the other end is connected to the foam inlet interface, the other side of the foam stock liquid buffer chamber 11 is connected to the liquid inlet end of the foam pump 4 through the connecting pipe II, the liquid outlet end of the foam pump 4 is connected to the foam infusion pipe 22, the other end of the foam infusion pipe 22 is connected to the liquid-liquid mixer 5, a second electric three-way ball valve 13 is provided on the foam infusion pipe 22, the side interface of the second electric three-way ball valve 13 is connected to the foam return branch pipe 21, the other end of the foam return branch pipe 21 is connected to the foam pump return pipe 17, and the other end of the foam pump return pipe 17 is connected to the foam pump return interface.

[0021] One end of the air intake pipe 19 is connected to the air intake interface, and the other end is connected to the gas-liquid mixer 8. The air intake pipe 19 is provided with a heat exchanger 6 and a pneumatic angle seat valve 7. Two air compressors are provided, one for use and one for backup. The air compressor is connected to the air intake interface through an external pipeline. When in use, the air compressor is started, and the compressed air is cooled by the heat exchanger 6 and injected into the gas-liquid mixer 8 through the air intake pipe 19, mixed with the mixed liquid to foam, and the foamed foam liquid is fully mixed by the subsequent spoiler 12 and the liquid outlet pipe 16, and then flows out from the liquid outlet, and flows to the release end through the external pipe network to extinguish the fire area.

[0022] A manual gate valve 9 is provided on the water delivery pipe 20; this design enables the device to have a manual control function, that is, the device can be started in two ways, automatic or manual, and has higher applicability.

[0023] Specifically, each of the external components is connected to the corresponding interface through an external connecting pipe. When in use, a water pump 3 is started, and the water in the water tank outside the cabin 1 enters the water pump inlet pipe 15 through the water pump inlet interface, and then flows from the water outlet of the water pump 3 to the water pipe 20, and then enters the liquid-liquid mixer 5; a foam pump 4 is started, and the foam stock liquid in the foam stock liquid tank reaches the foam stock liquid buffer chamber 11 through the foam liquid inlet interface and the foam liquid inlet pipe 18, and the foam pump 4 extracts foam from the foam stock liquid buffer chamber 11. The foam liquid is pressurized and then enters the liquid-liquid mixer 5 through the foam infusion pipe 22, where it is mixed with water in a certain proportion to form a mixed liquid, which continues to flow to the gas-liquid mixer 8; the air compressor is started, and the compressed air is cooled by the heat exchanger 6, and then injected into the gas-liquid mixer 8 through the air inlet pipe 19, where it is mixed with the mixed liquid to form foam, and the foamed foam liquid is fully mixed by the subsequent spoiler 12 and the liquid outlet pipe 16, then flows out from the liquid outlet, and flows to the release end through the external pipe network to extinguish the fire in the fire area.

[0024] The first electric three-way ball valve 10 is used to change the direction of water flow. When the first electric three-way ball valve 10 is started, the water flow direction changes, and the water cannot enter the water supply pipe 20, but can only enter the water pump return pipe 14. The water eventually returns to the water tank, achieving the function of the inspection pump. After the pump is started, the water flows back to the water tank, causing no waste and having no impact on the protection area.

[0025] The second electric three-way ball valve 16 is used to change the flow direction of the foam stock liquid. When the second electric three-way ball valve 16 is started, the flow direction of the foam stock liquid is changed. The foam stock liquid can only flow into the foam return liquid branch pipe 21, and then flow to the foam pump return liquid pipe 17, and then pass through the foam pump return liquid interface and finally return to the foam stock liquid tank to reach the function of the inspection pump. After starting the pump, the foam stock liquid flows back to the foam stock liquid tank, which does not cause waste and has no impact on the protection area.

[0026] The water pump 3 and the foam pump 4 in this device have the function of inspecting their own pumps respectively, and there are two air compressors, water pumps 3 and foam pumps 4 respectively, and the two air compressors are one backup and one use. This redundant design ensures that when some components in the device fail, the equipment can still work normally, reducing the probability of equipment failure and improving reliability. Otherwise, once a failure occurs, it will lead to the loss of fire extinguishing function and the consequences will be disastrous. At the same time, the water pump 3 and the foam pump 4 have a self-checking function and do not affect the normal use of the device, further improving safety and reliability. In addition, this device adopts positive pressure to form foam, which is different from the previous negative pressure liquid suction mixing and air suction foaming. The foam quality is better and the fire extinguishing performance is improved.

[0027] The device is equipped with instruments in each internal pipeline, which are used to collect corresponding flow information and pressure information, and control the operating status of each pump and air compressor through PID algorithm, and the control cabinet 2 controls the operation status of each pump and air compressor to achieve a stable mixing ratio and gas-liquid ratio, and the parameters can be adjusted according to different fire extinguishing objects; and the foaming multiple of the generated foam can be set at 6 to 10 times according to different fire extinguishing objects, so that the effective fire extinguishing time is long and the fire extinguishing speed is fast.

[0028] The device separately sets external components outside the square cabin 1, that is, the water tank, the foam liquid tank and the air compressor are arranged externally, which can reduce the volume of the square cabin 1. At the same time, after being arranged externally, the volume of the water tank and the foam liquid tank can be increased according to needs, and the air compressor can also be adjusted according to different foaming multiples, thereby ensuring the fire extinguishing performance of the device. After being arranged externally, the layout is more flexible and more applicable.

[0029] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fixed compressed air foam fire extinguishing device for a substation, comprising a shelter (1); characterized in that: The front surface of the square cabin (1) is provided with a double-leaf door, the lower right corner of the front surface of the square cabin (1) is provided with a liquid outlet, a control cabinet (2) is provided on the left side of the square cabin (1), an internal component is provided inside the square cabin (1) and on the right side of the control cabinet, and an external component is provided outside the square cabin (1), the internal component includes a water pump (3), a foam pump (4), a heat exchanger (6), a liquid-liquid mixer (5), a gas-liquid mixer (8), a foam stock liquid buffer chamber (11), a first electric three-way ball valve (10), a second electric three-way ball valve (13) and an internal pipeline group, the external component includes a water tank, a foam stock liquid tank and an air compressor, the internal pipeline group includes a water pump return pipe (14), a water pump inlet pipe (15), a liquid outlet pipe (16), a foam pump return pipe (17), a foam inlet pipe (18), an air inlet pipe (19), a water delivery pipe (20), a foam delivery pipe (21), a foam delivery pipe (22), a foam delivery pipe (23), a foam delivery pipe (24), a foam delivery pipe (25), a foam delivery pipe (26), a foam delivery pipe (27), a foam delivery pipe (28), a foam delivery pipe (29), a foam delivery pipe (30), a foam delivery pipe (31), a foam delivery pipe (32), a foam delivery pipe (33), a foam delivery pipe (34), a foam delivery pipe (35), a foam delivery pipe (36), a foam delivery pipe (37), a foam delivery pipe (38), a foam delivery pipe (39), a foam delivery pipe (40), a foam delivery pipe (41), a foam delivery pipe (42), a foam delivery pipe (43), a foam delivery pipe (44), a foam delivery pipe (45), a foam delivery pipe (46), a foam delivery pipe (47), a foam delivery pipe (48), a heat exchanger (6), a liquid-liquid mixer (5), a gas-liquid A liquid pipe (22) and a foam return liquid branch pipe (21) are provided at the bottom of the rear side wall of the cabin. A water pump return water interface, a water pump water inlet interface, a foam pump return liquid interface, a foam liquid inlet interface and an air inlet interface are provided. Two water pumps (3) are provided and are installed side by side horizontally on the inner bottom wall of the cabin (1). The water inlet end of the water pump (3) faces inward and is connected to the water pump water inlet pipe (15). The other end of the water pump water inlet pipe (15) is connected to the water pump water inlet interface. The water outlet end of the water pump (3) is connected to the water delivery pipe (20) through a first electric three-way ball valve (10). The other end of the water delivery pipe (20) is connected to a liquid-liquid mixer (5). The other end of the liquid-liquid mixer (5) is connected to a gas-liquid mixer (8) through a connecting pipe I. The other end of the gas-liquid mixer (8) is connected to a liquid outlet pipe (16) through a spoiler (12). The other end of the liquid outlet pipe (16) is connected to a liquid outlet.

2. A fixed compressed air foam fire extinguishing device for a substation according to claim 1, characterized in that: The foam stock solution buffer chamber (11) is fixedly mounted on the inner bottom wall of the cabin (1); one end of the foam liquid inlet pipe (18) is connected to the foam stock solution buffer chamber (11) and the other end is connected to the foam liquid inlet interface; the other side of the foam stock solution buffer chamber (11) is connected to the liquid inlet end of the foam pump (4) via a connecting pipe II; the liquid outlet end of the foam pump (4) is connected to a foam infusion pipe (22); the other end of the foam infusion pipe (22) is connected to a liquid-liquid mixer (5); and a second electric three-way ball valve (13) is provided on the foam infusion pipe (22).

3. A fixed compressed air foam fire extinguishing device for a substation according to claim 2, characterized in that: One end of the air intake pipe (19) is connected to the air intake interface, and the other end is connected to the gas-liquid mixer (8). A heat exchanger (6) and a pneumatic angle seat valve (7) are provided on the air intake pipe (19). Two air compressors are provided, and the air compressors are connected to the air intake interface via external pipelines.

4. A fixed compressed air foam fire extinguishing device for a substation according to claim 3, characterized in that: The water delivery pipe (20) is provided with a manual gate valve (9).

5. A fixed compressed air foam fire extinguishing device for a substation according to claim 4, characterized in that: The side interface of the first electric three-way ball valve (10) is connected to a water pump return pipe (14), and the other end of the water pump return pipe (14) is connected to a water pump return interface.

6. A fixed compressed air foam fire extinguishing device for a substation according to claim 5, characterized in that: The side interface of the second electric three-way ball valve (13) is connected to a foam liquid return branch pipe (21), the other end of the foam liquid return branch pipe (21) is connected to a foam pump liquid return pipe (17), and the other end of the foam pump liquid return pipe (17) is connected to a foam pump liquid return interface.

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