Automatic fire extinguishing device for cable channel of thermal power plant

Abstract

This utility model belongs to the field of fire extinguishing in cable channels, specifically an automatic fire extinguishing device for cable channels in thermal power plants. It includes a cable channel section, with a pair of pre-pressurized liquid storage tanks fixedly connected to the top of the cable channel section; a pair of transmission pipes fixedly connected to the inner wall of the cable channel section; the transmission pipes and the pre-pressurized liquid storage tanks are in communication; a hinge is rotatably connected to the side wall of the transmission pipe; a fusible link is slidably fitted in the middle of the transmission pipe; a fixing screw is threaded to the end of the hinge; the fixing screw and the surface of the transmission pipe are threadedly connected; a connecting component is provided at the bottom of the hinge; by using the fusible link, its low melting point characteristic allows it to break automatically when the temperature exceeds a critical point, thereby unlocking the transmission pipe. Finally, the pressure inside the pre-pressurized liquid storage tanks rapidly releases the extinguishing agent, accelerating the treatment of the fire source and reducing the fire extinguishing activation time. The extinguishing agent is rapidly sprayed out using the pressure inside the pre-pressurized liquid storage tanks.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing in cable tunnels, specifically an automatic fire extinguishing device for cable tunnels in thermal power plants. Background Technology

[0002] A thermal power plant consists of three main systems: fuel supply, combustion power generation, and power output. Fuel is burned in a boiler to produce steam, which drives a turbine to generate electricity, converting mechanical energy into electrical energy. The electricity is then stepped up by a transformer and transmitted to the power grid. The system operation relies on a large number of cables to achieve equipment control, signal transmission, and power distribution. The cable channel is a closed or semi-closed space within the power plant specifically for laying and protecting cables. It is responsible for connecting cables from the control room and power distribution room to core equipment such as boilers and turbines, and is the "nerve network" that ensures power transmission and equipment linkage.

[0003] Fires in cable tunnels of thermal power plants are often caused by the aging of cables over long-term operation, leading to insulation damage, short circuits, and heat release. Given the narrow space of cable tunnels, the difficulty of manual firefighting, and the risk of electric shock, firefighting robots are usually dispatched to handle the situation. These robots can be remotely controlled to enter the tunnels, and their infrared thermal imagers can accurately locate the fire source.

[0004] Existing methods for extinguishing fires in cable tunnels involve dispatching firefighting robots. However, these robots require time to travel, and the longer the journey, the more time is consumed, potentially causing the optimal time for firefighting to be missed.

[0005] Therefore, an automatic fire extinguishing device for cable channels in thermal power plants is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: An automatic fire extinguishing device for cable channels in thermal power plants, comprising a cable channel section, a pair of pre-pressurized liquid storage tanks fixedly connected to the top of the cable channel section; a pair of transmission pipes fixedly connected to the inner wall of the cable channel section; the transmission pipes and the pre-pressurized liquid storage tanks being in communication; a hinge rotatably connected to the side wall of the transmission pipe; a fusible link slidingly fitted in the middle of the transmission pipe; a fixing screw threadedly connected to the end of the hinge; the fixing screw and the surface of the transmission pipe being threadedly connected; a connecting assembly provided at the bottom of the hinge; a nozzle connected to the bottom of the connecting assembly; and multiple cable assemblies provided on the inner wall of the cable channel section. By using the fusible link, its low melting point characteristic allows it to break automatically when the temperature exceeds a critical point, thereby unlocking the transmission pipes. Finally, the extinguishing agent is rapidly released by the pressure inside the pre-pressurized liquid storage tanks, accelerating the treatment of the fire source and reducing the fire extinguishing activation time. The extinguishing agent is rapidly sprayed out using the pressure inside the pre-pressurized liquid storage tanks.

[0008] Preferably, the connecting component includes a bolt; the bolt and the transmission pipe are in communication; the nozzle has an internal thread; the bolt and the internal thread are threadedly connected; the nozzle has a spray chamber inside; the connecting component and the transmission pipe are in communication; by using the internal thread for installation and disassembly, the nozzle can be quickly installed and fixed by thread engagement when it is replaced, thereby speeding up the replacement of the nozzle.

[0009] Preferably, the bottom of the cable channel section is provided with multiple collection slots; the inside of the collection slots is set with an incline; by adding collection slots, the fallen extinguishing agent can be collected, the collection of extinguishing agent can be accelerated, thereby increasing the convenience of subsequent cleaning of used extinguishing agent.

[0010] Preferably, multiple copper sleeves are fixed to the side wall of the transmission pipe; the surface of the copper sleeves is raised; by increasing the number of copper sleeves, the multi-faceted contact of the copper sleeves can be utilized, and the material of the copper sleeves can conduct heat more quickly, thereby accelerating the absorption of heat.

[0011] Preferably, multiple fixing brackets are fixedly connected inside the cable channel section; an infrared camera is provided at the end of each fixing bracket; by adding an infrared camera, the characteristics of infrared radiation can be used to quickly separate heat, thereby accelerating the inspection of the processed results.

[0012] Preferably, a heat insulation sleeve is slidably fitted at the end of the fixing screw; the heat insulation sleeve and the fixing screw are correspondingly arranged; by adding the heat insulation sleeve, the fixing screw can be protected, the heating rate of the fixing screw can be reduced, thereby reducing the damage of temperature to the fixing screw.

[0013] The advantages of this utility model are: 1. The automatic fire extinguishing device for cable channels in thermal power plants described in this utility model utilizes the low melting point of a fusible link to automatically break when the temperature exceeds a critical point, thereby unlocking the transmission pipe. Finally, the extinguishing agent is rapidly released through the pressure inside a pre-pressurized storage tank, accelerating the treatment of the fire source and reducing the fire extinguishing activation time. The extinguishing agent is rapidly sprayed out using the pressure inside the pre-pressurized storage tank.

[0014] 2. The automatic fire extinguishing device for cable channels in thermal power plants described in this utility model is installed and disassembled using internal threads. When the nozzle is to be replaced, it can be quickly installed and fixed by thread engagement, thereby speeding up the replacement of the nozzle. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main body of this utility model; Figure 2 This is a schematic diagram of the structure of the fixing frame in this utility model; Figure 3 This is a schematic diagram of the transmission tube in this utility model; Figure 4 This is a schematic diagram of the hinge structure in this utility model; Figure 5 This is a schematic diagram of the nozzle structure in this utility model.

[0017] In the diagram: 1. Cable channel section; 11. Pre-set pressure storage tank; 12. Transmission pipe; 13. Hinge; 14. Fuse; 15. Fixing screw; 16. Connecting assembly; 17. Nozzle; 18. Cable assembly; 2. Bolt; 21. Internal thread; 22. Spray chamber; 3. Collection tank; 4. Copper sleeve; 5. Fixing bracket; 51. Infrared camera; 6. Heat insulation sleeve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Specific implementation examples are given below.

[0020] like Figures 1 to 5 As shown in the embodiment of this utility model, an automatic fire extinguishing device for a cable channel in a thermal power plant includes a cable channel section 1. A pair of pre-pressurized liquid storage tanks 11 are fixedly connected to the top of the cable channel section 1. A pair of transmission pipes 12 are fixedly connected to the inner wall of the cable channel section 1. The transmission pipes 12 and the pre-pressurized liquid storage tanks 11 are in communication. A hinge 13 is rotatably connected to the side wall of the transmission pipe 12. A fusible link 14 is slidably fitted in the middle of the transmission pipe 12. A fixing screw 15 is threadedly connected to the end of the hinge 13. The fixing screw 15 and the surface of the transmission pipe 12 are threadedly connected. A connecting assembly 16 is provided at the bottom of the hinge 13. 16 has a nozzle 17 connected to its bottom; multiple cable assemblies 18 are provided on the inner wall of the cable channel section 1; during operation, in daily use, first turn the fixing screw 15 to remove it from the inside of the transmission tube 12, at which point the hinge 13 is unlocked, and the hinge 13 can be turned away from the inside of the transmission tube 12. Then, insert the fuse 14 into the inside of the hinge 13. After insertion, turn the hinge 13 back into the transmission tube 12. At this time, the fuse 14 will be pressed and fixed by the transmission tube 12 and the hinge 13. After pressing, turn the fixing screw 15 to enter the transmission tube 12 and fix the hinge 13. Then, the preset... The corresponding extinguishing agent is added to the pressure storage tank 11. At this time, the corresponding nozzle 17 can be replaced via the connecting assembly 16 according to the type of extinguishing agent. After the extinguishing agent is filled into the pre-pressurized storage tank 11, a fixed pressure is set inside the pre-pressurized storage tank 11. When a fire source appears inside the cable channel section 1 during use, the temperature inside the cable channel section 1 will rise. This temperature rise is transmitted to the fuse 14 through the transmission pipe 12. When the temperature received by the fuse 14 exceeds 80 degrees Celsius, the fuse 14 will melt and break on its own. After the fuse 14 breaks, the pressure inside the pre-pressurized storage tank 11 will be released. During the release... The extinguishing agent is propelled through the transmission pipe 12 to the nozzle 17 and then sprayed outwards. When the temperature exceeds 80 degrees Celsius, the fuse 14 breaks automatically, releasing the extinguishing agent and quickly spraying it onto the surrounding fire source. After each use, the above steps can be repeated for maintenance. By using the fuse 14, its low melting point characteristic is utilized. When the temperature exceeds the critical point, the fuse 14 breaks automatically, thereby unlocking the transmission pipe 12. Finally, the extinguishing agent is quickly released by the pressure inside the pre-pressurized storage tank 11, which speeds up the treatment of the fire source and reduces the fire extinguishing start-up time. The extinguishing agent is quickly sprayed out by utilizing the pressure inside the pre-pressurized storage tank 11.

[0021] like Figures 3 to 5As shown, the connecting assembly 16 includes a bolt 2; the bolt 2 and the transmission pipe 12 are connected; the nozzle 17 has an internal thread 21; the bolt 2 and the internal thread 21 are threadedly connected; the nozzle 17 has a spray chamber 22 inside; the connecting assembly 16 and the transmission pipe 12 are connected; during operation, when the nozzle 17 needs to be replaced according to the extinguishing agent, the nozzle 17 is first rotated so that the nozzle 17 gradually disengages from the surface of the connecting assembly 16. After disengagement, the corresponding nozzle 17 is replaced. Subsequently, when the extinguishing agent is sprayed, it will enter the spray chamber 22 through the connecting assembly 16, and finally spray out through the holes on the surface of the nozzle 17; by using the internal thread 21 for installation and disassembly, the nozzle 17 can be quickly installed and fixed by thread engagement when it is replaced, thereby speeding up the replacement speed of the nozzle 17.

[0022] like Figure 1 As shown, multiple collection troughs 3 are provided at the bottom of the cable channel section 1; the inside of the collection trough 3 is set at an angle; during operation, when the nozzle 17 continuously sprays extinguishing agent, the extinguishing agent that falls to the bottom of the cable channel section 1 enters the collection trough 3 and moves to one end according to the angle inside the collection trough 3, thereby accumulating and reducing the processing time when collecting the extinguishing agent during subsequent cleanup; by adding collection troughs 3, the fallen extinguishing agent can be collected, speeding up the collection of the extinguishing agent, thereby increasing the convenience of subsequent cleanup of the used extinguishing agent.

[0023] like Figures 2 to 3 As shown, multiple copper sleeves 4 are fixed to the side wall of the transmission pipe 12; the surface of the copper sleeve 4 is raised; during operation, when high temperature is generated inside the cable channel section 1, the copper sleeve 4 will transfer the absorbed heat to the transmission pipe 12, making the transmission pipe 12 heat up faster, thereby accelerating the temperature reception of the fuse 14; by increasing the number of copper sleeves 4, the multi-faceted contact of the copper sleeves 4 can be utilized, and at the same time, the material of the copper sleeves 4 can conduct heat faster, thereby accelerating the absorption of heat.

[0024] like Figures 1 to 2 As shown, multiple fixing frames 5 are fixedly connected inside the cable channel section 1; an infrared camera 51 is provided at the end of the fixing frame 5; during operation, when dealing with the fire source, the operator can judge whether the fire source has been eliminated by the image transmitted by the infrared camera 51, and thus determine whether to proceed to the next step; by adding the infrared camera 51, the characteristics of infrared can be used to quickly distinguish heat, thereby speeding up the inspection of the processed effect.

[0025] like Figures 3 to 4As shown, a heat insulation sleeve 6 is slidably fitted at the end of the fixing screw 15; the heat insulation sleeve 6 and the fixing screw 15 are correspondingly arranged; during operation, the heat insulation sleeve 6 will block some of the external heat when the fixing screw 15 is in use, so that the fixing screw 15 is exposed to less heat; by adding the heat insulation sleeve 6, the fixing screw 15 can be protected, the heating rate of the fixing screw 15 can be reduced, thereby reducing the damage of temperature to the fixing screw 15.

[0026] Working principle: In daily use, first turn the fixing screw 15 to disengage it from the transmission pipe 12. At this time, the hinge 13 is unlocked and can be rotated out of the transmission pipe 12. Then, insert the fuse 14 into the hinge 13. After insertion, rotate the hinge 13 back into the transmission pipe 12. At this time, the fuse 14 will be pressed and fixed by the transmission pipe 12 and the hinge 13. After compression, turn the fixing screw 15 to enter the transmission pipe 12 and fix the hinge 13. Then, add the corresponding extinguishing agent into the pre-pressurized liquid storage tank 11. At this time, the extinguishing agent can be added according to the extinguishing agent... The type of nozzle 17 is replaced by the corresponding nozzle 17 through the connecting component 16. After the fire extinguishing agent is filled into the pre-pressurized liquid storage tank 11, a fixed pressure is set inside the pre-pressurized liquid storage tank 11. When a fire source appears inside the cable channel section 1 during use, the temperature inside the cable channel section 1 will rise. When the temperature rises, it is transmitted to the fuse 14 through the transmission pipe 12. When the temperature received by the fuse 14 exceeds 80 degrees, the fuse 14 will melt and break on its own. When the fuse 14 breaks, the pressure inside the pre-pressurized liquid storage tank 11 will be released. During the release, it will push the fire extinguishing agent through the transmission pipe 12 to the nozzle 17. The extinguishing agent is sprayed outwards and diffuses to the surrounding area. When the temperature exceeds 80 degrees Celsius, the fuse 14 breaks automatically, releasing the extinguishing agent and quickly spraying it onto the surrounding fire source. Maintenance can be performed by repeating the above steps after each use. When the nozzle 17 needs to be replaced according to the extinguishing agent, first rotate the nozzle 17 to gradually detach it from the surface of the connecting assembly 16. After detachment, replace the corresponding nozzle 17. Subsequently, when the extinguishing agent is sprayed, it will enter the spray chamber 22 through the connecting assembly 16 and finally spray out through the holes on the surface of the nozzle 17. When the nozzle 17 continuously sprays the extinguishing agent, the extinguishing agent that falls to the bottom of the cable channel section 1... After the extinguishing agent enters the collection tank 3, it will move to one end according to the slope inside the collection tank 3, thereby accumulating and reducing the processing time when collecting the extinguishing agent during subsequent cleanup; when high temperature is generated inside the cable channel section 1, the copper sleeve 4 will transfer the absorbed heat to the transmission pipe 12, making the transmission pipe 12 heat up faster, thereby accelerating the temperature reception of the fuse 14; when dealing with the fire source, the operator can judge whether the fire source has been eliminated through the image transmitted by the infrared camera 51, and thus decide whether to proceed with the next step; during the use of the fixing screw 15, the heat insulation sleeve 6 will block some of the external heat, so that the fixing screw 15 is exposed to less heat.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An automatic fire extinguishing device for cable channels in thermal power plants, characterized in that: The cable channel section (1) includes a cable channel section (1) with a pair of pre-pressurized liquid storage tanks (11) fixedly connected to its top; a pair of transmission pipes (12) are fixedly connected to the inner wall of the cable channel section (1); the transmission pipes (12) and the pre-pressurized liquid storage tanks (11) are connected in a communication relationship; a hinge (13) is rotatably connected to the side wall of the transmission pipe (12); a fuse (14) is slidably fitted in the middle of the transmission pipe (12); a fixing screw (15) is threadedly connected to the end of the hinge (13); the fixing screw (15) and the surface of the transmission pipe (12) are threadedly connected; a connecting assembly (16) is provided at the bottom of the hinge (13); a nozzle (17) is connected to the bottom of the connecting assembly (16); and multiple cable assemblies (18) are provided on the inner wall of the cable channel section (1).

2. The automatic fire extinguishing device for cable channels in thermal power plants according to claim 1, characterized in that: The connecting component (16) includes a bolt (2); the bolt (2) and the transmission pipe (12) are connected; the nozzle (17) has an internal thread (21); the bolt (2) and the internal thread (21) are threaded; the nozzle (17) has a spray chamber (22) inside; the connecting component (16) and the transmission pipe (12) are connected.

3. An automatic fire extinguishing device for cable channels in thermal power plants according to claim 2, characterized in that: The bottom of the cable channel section (1) is provided with multiple collection grooves (3); the inside of the collection grooves (3) is set with an incline.

4. An automatic fire extinguishing device for cable channels in thermal power plants according to claim 3, characterized in that: The transmission pipe (12) has multiple copper sleeves (4) fixed to its side wall; the surface of the copper sleeves (4) is raised.

5. An automatic fire extinguishing device for cable channels in thermal power plants according to claim 4, characterized in that: The cable channel section (1) is internally fixed with multiple fixing brackets (5); an infrared camera (51) is provided at the end of the fixing bracket (5).

6. An automatic fire extinguishing device for cable channels in thermal power plants according to claim 5, characterized in that: The end of the fixing screw (15) is slidably fitted with a heat insulation sleeve (6); the heat insulation sleeve (6) and the fixing screw (15) are provided correspondingly.

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