Ventilation system with fire-fighting function

Abstract

The utility model relates to the technical field of tunnel ventilation, and discloses a ventilation system with a fire-fighting function, which comprises a tunnel body and two filter plates, air inlet fans are fixedly arranged at the lower parts of the two sides in the tunnel body, and a fixing sleeve is fixedly arranged in the middle of the top surface in the tunnel body. An exhaust fan is fixedly arranged on the upper portion of the inner side of the fixing sleeve, sliding grooves are formed in the lower portions of the middles of the two sides of the interior of the fixing sleeve, mounting and dismounting assemblies are fixedly arranged on the upper portions of the opposite sides of the two sliding grooves, sliding blocks are fixedly arranged on the middles of the two sides of the filtering plate, and connecting rods are fixedly arranged on the two sides of the upper end face of the tunnel body. Storage boxes are fixedly arranged at the lower ends of the two connecting rods correspondingly, bearing sleeves are fixedly arranged at the positions, close to the rear ends, in the two storage boxes correspondingly, and mounting rods are rotationally arranged on the inner sides of the two bearing sleeves in a sleeving mode. According to the utility model, the fire extinguishing efficiency of the tunnel body when a fire disaster occurs is improved, and the safety of the tunnel body when the fire disaster occurs is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel ventilation, in particular to a ventilation system with fire-fighting function. Background Art

[0002] Tunnel ventilation system is a series of facilities and equipment designed to ensure good air quality, suitable temperature and good visibility in the tunnel. Its main purpose is to provide safety for traffic in the tunnel and ensure the comfort and safety of passers-by and vehicles in the tunnel, and to ensure safety and comfort in the tunnel.

[0003] The existing tunnel ventilation system discharges outside air into the tunnel during use, and discharges exhaust gas inside the tunnel to maintain the air quality of the tunnel. However, when a fire occurs in the tunnel, the ventilation system cannot carry out emergency treatment for the fire. The ventilation system does not have a fire-fighting function, which can easily lead to the paralysis of the ventilation system.

[0004] Therefore, the utility model provides a ventilation system with fire-fighting function to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a ventilation system with fire-fighting function, so that the gas inside the tunnel body will not be affected by the blockage of garbage when it is discharged, the efficiency of maintenance and replacement by personnel is improved, and when a fire occurs, the angle of the high-pressure nozzle can be adjusted to improve the efficiency of fire extinguishing.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ventilation system with fire-fighting function, comprising a tunnel body and two filter plates, wherein air intake fans are fixedly arranged at the lower sides of the interior of the tunnel body, a fixed sleeve is fixedly arranged at the middle of the top surface of the interior of the tunnel body, an exhaust fan is fixedly arranged at the upper side of the inner side of the fixed sleeve, slide grooves are provided at the lower sides of the interior of the fixed sleeve, and installation and disassembly components are fixedly arranged at the upper side of the two opposite sides of the slide grooves, sliders are fixedly arranged at the middle of the two sides of the filter plate, connecting rods are fixedly arranged at the two sides of the upper end surface of the tunnel body, storage boxes are fixedly arranged at the lower ends of the two connecting rods, bearing sleeves are fixedly arranged at the rear ends of the two storage boxes, mounting rods are provided on the rotating sleeves inside the two bearing sleeves, and high-pressure nozzles are fixedly arranged inside the two mounting rods;

[0007] The upper ends of the two high-pressure nozzles are fixedly connected with hoses, the upper ends of the two hoses are fixedly provided with folding tubes, the upper ends of the two folding tubes are fixedly provided with connecting tubes, water storage tanks are fixedly provided on both sides of the tunnel body below the air intake fan, water pumps are embedded in the middle of both sides of the two water storage tanks, the two water pumps are fixedly connected to the two connecting tubes respectively, and adjustment components are fixedly provided on both sides of the two high-pressure nozzles;

[0008] The two installation and disassembly components include two installation and disassembly grooves, four second limiting rods, two extrusion sleeves and two extrusion rods, the two extrusion sleeves are fixedly provided with strong springs inside, the two extrusion rods are fixedly provided with a clamping block on the opposite side, the upper and lower ends of the two clamping blocks are fixedly connected with second ropes, the four second ropes are fixedly connected with moving sleeves on the opposite sides of two pairs, and the two moving sleeves are fixedly provided with handles on the opposite sides;

[0009] The two adjustment components include two electric push rods, two first limit rods, two first ropes and buffer grooves, the two buffer grooves are both fixedly provided with sliding rods on both sides, the two buffer grooves are both fixedly provided with shock absorbers in the middle of the bottom surface, and the two first ropes are both fixedly connected with extrusion plates on the opposite sides;

[0010] Through the above technical scheme, the outside air is discharged into the tunnel body through the air intake fans at the lower sides of the tunnel body, and the exhaust fan inside the fixed sleeve is used to discharge the exhaust gas through the fixed sleeve through the fixed sleeve. The filter plate is conveniently installed and removed through the installation and removal components inside the slide grooves on both sides of the fixed sleeve, so that the filter plate can filter garbage and impurities when exhausting to prevent damage to the exhaust fan. The filter plate can be quickly installed and removed to prevent the accumulation of impurities and the inability to exhaust normally, so as to avoid the situation where smoke cannot be discharged in the event of a fire. Through the connecting rods on both sides of the top surface of the tunnel body, the bearing sleeve inside the storage box at the lower end of the connecting rod is rotated to the sleeve of the mounting rod, so that the high-pressure nozzle is fixed on the mounting rod, and the hose on the high-pressure nozzle is connected to the folding pipe, so that the connecting pipe on the folding pipe is connected to the water pump inside the water storage tank. Through the adjustment components on both sides of the high-pressure nozzle, spray fire extinguishing treatment is performed when a fire occurs in the tunnel body, and the angle is adjusted to increase the spraying area and improve the efficiency of fire extinguishing.

[0011] The movable sleeve is driven to move by the handle in the installation and removal assembly, so that the second rope on the movable sleeve drives the clamping block to move, so that the extrusion rod connected to the clamping block slides inside the extrusion sleeve and squeezes the strong spring inside the extrusion sleeve, so that the slider slides in the slide groove, and then the handle is released to make the clamping block clamp the clamping groove on the slider, so that the filter plate can be installed and removed for cleaning, and dust or garbage piles can be prevented from clogging the filter plate, and the situation that the gas cannot be discharged normally when the tunnel body is exhausted and there is smoke in a fire can be prevented, so that the gas inside the tunnel body is not affected when it is discharged, the safety of ventilation is maintained, and the efficiency of maintenance and replacement by personnel is improved;

[0012] By adjusting the electric push rod in the assembly to extend one end and retract the other end, and fixing the high-pressure nozzle on the mounting rod to rotate in the bearing sleeve, the angle of the high-pressure nozzle can be adjusted when the electric push rod is pushed, and the first rope can slide around the first limit rod, and the extrusion plate connected to the first rope can slide around the slide rod, and the shock absorber can be squeezed and buffered, so that when a fire occurs inside the tunnel body, the fire source can be sprayed and the spray angle can be adjusted, thereby improving the efficiency of fire extinguishing, preventing the situation where the fire position cannot be adjusted and the fire cannot be extinguished, and ensuring the effectiveness of personnel escape and fire emergency treatment in the tunnel body.

[0013] Furthermore, the two extrusion rods are respectively slidably sleeved inside the two extrusion sleeves, and the two strong springs are respectively fixedly connected to the two extrusion rods;

[0014] Through the above technical solution, the extrusion rod sliding sleeve is arranged inside the extrusion sleeve, so that the extrusion sleeve is connected with the strong spring to squeeze the strong spring when sliding.

[0015] Furthermore, the four second ropes slide around the four second limit rods respectively, and the two clamping blocks are respectively clamped and arranged inside the two clamping slots;

[0016] Through the above technical solution, the second rope slides around the second limiting rod, which facilitates the connection between the rope and the clamping block. The clamping block is clamped inside the clamping slot, which facilitates the installation and removal of the filter plate.

[0017] Furthermore, the two sliding blocks are slidably arranged in the four sliding grooves respectively, and holding rods are fixedly arranged on both sides of the lower end surface of the filter plate;

[0018] Through the above technical solution, the sliding block slides in the slide groove to improve the efficiency of installing and removing the filter plate, facilitate positioning, and the filter plate is conveniently held by the holding rods on both sides of the lower end surface of the filter plate.

[0019] Furthermore, the exhaust fan is fixedly connected to an exhaust duct and passes through the tunnel body, and opposite sides of the two intake fans are fixedly connected to intake ducts and pass through the tunnel body;

[0020] Through the above technical solution, the exhaust duct fixedly connected by the exhaust fan runs through the tunnel body, which is convenient for discharging exhaust gas. The air intake duct connected by the air intake fan runs through the tunnel body, which is convenient for discharging fresh air from the outside into the tunnel body.

[0021] The utility model has the following beneficial effects:

[0022] 1. The utility model proposes a ventilation system with fire-fighting function, which is provided with a mounting assembly on the opposite side of the slide groove, and a handle in the mounting assembly drives the movable sleeve to move, so that the second rope on the movable sleeve drives the clamping block to move, so that the extrusion rod connected to the clamping block slides inside the extrusion sleeve and squeezes the strong spring inside the extrusion sleeve, so that after the slider slides in the slide groove, the handle is released to make the clamping block clamp with the clamping groove on the slider, so that the filter plate can be installed and removed for cleaning, and dust or garbage can be prevented from being blocked to the filter plate, and the situation that the gas cannot be discharged normally when the tunnel body is exhausted and there is smoke in a fire can be prevented, so that the gas inside the tunnel body is not affected when being discharged, the safety of ventilation is maintained, and the efficiency of maintenance and replacement by personnel is improved.

[0023] 2. The utility model proposes a ventilation system with fire-fighting function, which is connected to the high-pressure nozzle by adjusting components arranged on both sides of the storage box, so that the electric push rod in the adjusting component extends at one end and retracts at the other end, and the high-pressure nozzle is fixed on the mounting rod and rotated in the bearing sleeve, so that the angle of the high-pressure nozzle can be adjusted when the electric push rod is pushed, and the first rope can slide around the first limit rod, and the extrusion plate connected to the first rope can slide around the sliding rod, and the shock absorber can be squeezed and buffered, so that when a fire occurs inside the tunnel body, the fire source can be sprayed and the spray angle can be adjusted, thereby improving the efficiency of fire extinguishing, preventing the situation where the angle cannot be adjusted and the fire position cannot be extinguished, and ensuring the effectiveness of personnel escape and fire emergency treatment in the tunnel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the axial side of the utility model;

[0025] Figure 2 It is a front cross-sectional schematic diagram of the utility model;

[0026] Figure 3 It is an enlarged schematic diagram of point A of the utility model;

[0027] Figure 4 It is an enlarged schematic diagram of point B of the utility model;

[0028] Figure 5 It is an enlarged schematic diagram of point C of the utility model;

[0029] Figure 6 It is an enlarged schematic diagram of point D of the present invention.

[0030] Legend:

[0031] 1. Tunnel body; 2. Air intake duct; 3. Exhaust duct; 4. Air intake fan; 5. Water storage tank; 6. Adjustment assembly; 7. Installation assembly; 8. Fixing sleeve; 9. Exhaust fan; 10. Storage box; 11. Connecting pipe; 12. Connecting rod; 13. Slot; 14. Filter plate; 15. Slider; 16. Holding rod; 17. Slide; 18. Folding pipe; 19. Water pump; 20. Hose; 21. High-pressure nozzle; 22. Bearing sleeve; 23, mounting rod; 601, extrusion plate; 602, shock absorber; 603, slide rod; 604, first rope; 605, first limit rod; 606, buffer groove; 607, electric push rod; 701, block; 702, installation groove; 703, extrusion sleeve; 704, handle; 705, strong spring; 706, movable sleeve; 707, extrusion rod; 708, second limit rod; 709, second rope. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1-6, the utility model provides an embodiment: a ventilation system with fire protection function, including a tunnel body 1 and two filter plates 14, air intake fans 4 are fixedly arranged on both sides of the tunnel body 1 at the bottom, a fixed sleeve 8 is fixedly arranged in the middle of the top surface of the tunnel body 1, and an exhaust fan 9 is fixedly arranged on the inner side of the fixed sleeve 8 at the top, a slide groove 17 is opened in the middle of both sides of the fixed sleeve 8 at the bottom, and a mounting assembly 7 is fixedly arranged on the upper side of the two slide grooves 17. Slide blocks 15 are fixedly arranged in the middle of both sides of the filter plate 14, connecting rods 12 are fixedly arranged on both sides of the upper end surface of the tunnel body 1, and storage boxes 10 are fixedly arranged at the lower ends of the two connecting rods 12. Bearing sleeves 22 are fixedly arranged at the rear ends of the two storage boxes 10, and mounting rods 23 are rotatably sleeved inside the two bearing sleeves 22. High-pressure nozzles 21 are fixedly arranged inside the two mounting rods 23. The exhaust fan 9 contains a smoke alarm, which can sense the smoke in the exhaust gas to judge the occurrence of fire and carry out spray fire extinguishing treatment.

[0034] The upper ends of the two high-pressure nozzles 21 are fixedly connected with hoses 20, and the upper ends of the two hoses 20 are fixedly provided with folding tubes 18, and the upper ends of the two folding tubes 18 are fixedly provided with connecting tubes 11. Water storage tanks 5 are fixedly provided on both sides of the tunnel body 1 below the air intake fan 4, and water pumps 19 are embedded in the middle of both sides of the two water storage tanks 5. The two water pumps 19 are fixedly connected to the two connecting tubes 11 respectively, and adjustment components 6 are fixedly provided on both sides of the two high-pressure nozzles 21. The outside air is discharged into the tunnel body 1 through the air intake fans 4 on both sides of the tunnel body 1. The fixed sleeve 8 is arranged in the middle of the top surface of the tunnel body 1, so that the exhaust fan 9 inside the fixed sleeve 8 discharges the exhaust gas, and the installation and removal components 7 arranged in the slide grooves 17 on both sides of the fixed sleeve 8 are convenient for installing and removing the filter plate 14, so that the filter plate 14 can be easily installed and removed. The filter plate 14 filters garbage and impurities when exhausting air to prevent damage to the exhaust fan 9. The filter plate 14 can be quickly installed and removed to prevent the accumulation of impurities that lead to abnormal exhaust and avoid the situation where smoke cannot be discharged when a fire occurs. Through the connecting rods 12 arranged on both sides of the top surface of the tunnel body 1, the bearing sleeve 22 inside the storage box 10 at the lower end of the connecting rod 12 is rotated to the mounting rod 23, so that the high-pressure nozzle 21 is fixed on the mounting rod 23, and the hose 20 on the high-pressure nozzle 21 is connected to the folding tube 18, so that the connecting pipe 11 on the folding tube 18 is connected to the water pump 19 inside the water tank 5. Through the adjustment components 6 on both sides of the high-pressure nozzle 21, spray fire extinguishing treatment is performed when a fire occurs in the tunnel body 1, and the angle is adjusted to increase the spraying area and improve the efficiency of fire extinguishing.

[0035] The two installation and disassembly components 7 include two installation and disassembly grooves 702, four second limiting rods 708, two extrusion sleeves 703 and two extrusion rods 707. Strong springs 705 are fixedly arranged inside the two extrusion sleeves 703. Blocks 701 are fixedly arranged on opposite sides of the two extrusion rods 707. Second ropes 709 are fixedly connected to the upper and lower ends of the two blocks 701. The four second ropes 709 are fixedly connected to the opposite sides of the moving sleeves 706 in pairs. Handles 704 are fixedly arranged on the opposite sides of the two moving sleeves 706. The moving sleeves 706 are moved by the handles 704 in the installation and disassembly components 7, so that the second ropes 709 on the moving sleeves 706 drive the block 701 to move. Move, so that the extrusion rod 707 connected to the block 701 slides inside the extrusion sleeve 703 and squeezes the strong spring 705 inside the extrusion sleeve 703, so that the slider 15 slides in the slide groove 17, and then releases the handle 704 to make the block 701 engage with the slot 13 on the slider 15, so as to facilitate the installation and removal of the filter plate 14 for cleaning, to prevent dust or garbage from clogging the filter plate 14, and to prevent the gas from being normally discharged when the tunnel body 1 is vented or there is smoke in a fire, so that the gas inside the tunnel body 1 is not affected when being discharged, the safety of ventilation is maintained, and the efficiency of personnel maintenance and replacement is improved.

[0036] The two adjustment components 6 include two electric push rods 607, two first limit rods 605, two first ropes 604 and buffer grooves 606. Slide rods 603 are fixedly arranged on both sides of the two buffer grooves 606. Shock absorbers 602 are fixedly arranged in the middle of the bottom surface of the two buffer grooves 606. The opposite sides of the two first ropes 604 are fixedly connected with extrusion plates 601. The electric push rods 607 in the adjustment component 6 are used to extend one end and retract the other end, and the high-pressure nozzle 21 is fixed on the mounting rod 23 to rotate in the bearing sleeve 22, so as to facilitate the electric push rods 607. When pushed, the angle of the high-pressure nozzle 21 is adjusted, and the first rope 604 is made to slide around the first limit rod 605, so that the extrusion plate 601 connected to the first rope 604 slides around the slide rod 603, and the shock absorber 602 is squeezed and buffered, so that when a fire occurs inside the tunnel body 1, the fire source can be sprayed and the angle of the spray can be adjusted, thereby improving the efficiency of fire extinguishing, preventing the situation where the angle cannot be adjusted and the fire position cannot be extinguished, and ensuring the effectiveness of personnel escape and fire emergency treatment in the tunnel body 1.

[0037] The two extrusion rods 707 are respectively slidably sleeved inside the two extrusion sleeves 703, and the two strong springs 705 are respectively fixedly connected to the two extrusion rods 707. The extrusion rods 707 are slidably sleeved inside the extrusion sleeves 703, so that the extrusion sleeves 703 are connected to the strong springs 705 when sliding to squeeze the strong springs 705. The four second ropes 709 slide around the four second limit rods 708 respectively. The two clamping blocks 701 are respectively clamped and arranged in the two clamping grooves 13. The second ropes 709 slide around the second limit rods 708 to facilitate the connection between the ropes and the clamping blocks 701. The clamping blocks 701 are clamped and arranged in the clamping grooves 13 to facilitate the installation and disassembly of the filter plate 14, thereby reducing the blockage of garbage and impurities on the filter plate 14, and the smoke cannot be discharged in time to cause a dangerous situation.

[0038] The two sliders 15 are slidably arranged in the four slide grooves 17 respectively, and holding rods 16 are fixedly arranged on both sides of the lower end surface of the filter plate 14. The sliders 15 slide in the slide grooves 17 to improve the efficiency of installing and removing the filter plate 14, and facilitate positioning. The holding rods 16 on both sides of the lower end surface of the filter plate 14 are used to conveniently hold the filter plate 14. The exhaust fan 9 is fixedly connected to the exhaust pipe 3 and passes through the tunnel body 1. The opposite sides of the two intake fans 4 are fixedly connected to the intake pipe 2 and pass through the tunnel body 1. The exhaust pipe 3 fixedly connected by the exhaust fan 9 passes through the tunnel body 1, which is convenient for exhaust gas discharge. The intake pipe 2 connected by the intake fan 4 passes through the tunnel body 1, which is convenient for discharging fresh air from the outside into the tunnel body 1.

[0039] Working principle: During ventilation inside the tunnel body 1, the air inlet duct connected to the air inlet fan 4 discharges the outside air into the tunnel body 1, and the exhaust gas is discharged from the tunnel body 1 through the exhaust fan 9. The installation and removal components 7 arranged inside the slide grooves 17 on both sides of the fixed sleeve 8 facilitate the installation and removal of the filter plate 14, so that the filter plate 14 can filter garbage and impurities when exhausting to prevent damage to the exhaust fan 9. The filter plate 14 can be quickly installed and removed to prevent the accumulation of impurities that lead to abnormal exhaust and avoid smoke in the event of a fire. In the case where the water cannot be discharged, the connecting rod 12 arranged on both sides of the top surface of the tunnel body 1 is used to rotate the bearing sleeve 22 inside the storage box 10 at the lower end of the connecting rod 12 to sleeve the mounting rod 23, so that the high-pressure nozzle 21 is fixed on the mounting rod 23, and the hose 20 on the high-pressure nozzle 21 is connected to the folding tube 18, so that the connecting pipe 11 on the folding tube 18 is connected to the water pump 19 inside the water tank 5, and the adjustment components 6 on both sides of the high-pressure nozzle 21 are used to spray and extinguish the fire when a fire occurs in the tunnel body 1, and the angle is adjusted to increase the spraying area and improve the efficiency of fire extinguishing.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation system with fire-fighting function, comprising a tunnel body (1) and two filter plates (14), characterized in that: An air intake fan (4) is fixedly arranged at the lower part of both sides of the tunnel body (1), a fixed sleeve (8) is fixedly arranged at the middle of the top surface of the tunnel body (1), an exhaust fan (9) is fixedly arranged at the upper part of the inner side of the fixed sleeve (8), a slide groove (17) is provided at the lower part of both sides of the inner side of the fixed sleeve (8), a mounting assembly (7) is fixedly arranged at the upper part of the opposite side of the two slide grooves (17), a slider (15) is fixedly arranged at the middle part of both sides of the filter plate (14), connecting rods (12) are fixedly arranged at both sides of the upper end surface of the tunnel body (1), a storage box (10) is fixedly arranged at the lower end of the two connecting rods (12), a bearing sleeve (22) is fixedly arranged at the rear end of the two storage boxes (10), a mounting rod (23) is rotatably sleeved inside the two bearing sleeves (22), and a high-pressure nozzle (21) is fixedly arranged inside the two mounting rods (23); The upper ends of the two high-pressure nozzles (21) are fixedly connected to hoses (20), the upper ends of the two hoses (20) are fixedly provided with folding tubes (18), the upper ends of the two folding tubes (18) are fixedly provided with connecting tubes (11), water storage tanks (5) are fixedly provided on both sides of the tunnel body (1) below the air intake fan (4), water pumps (19) are embedded in the middle of both sides of the two water storage tanks (5), and the two water pumps (19) are fixedly connected to the two connecting tubes (11) respectively, and adjustment components (6) are fixedly provided on both sides of the two high-pressure nozzles (21).

2. A ventilation system with fire-fighting function according to claim 1, characterized in that: The two installation and removal components (7) include two installation and removal grooves (702), four second limiting rods (708), two extrusion sleeves (703) and two extrusion rods (707). The two extrusion sleeves (703) are fixedly provided with a strong spring (705) inside. The two extrusion rods (707) are fixedly provided with a clamping block (701) on the opposite side. The upper and lower ends of the two clamping blocks (701) are fixedly connected with a second rope (709). The four second ropes (709) are fixedly connected with a movable sleeve (706) on the opposite side in pairs. The two movable sleeves (706) are fixedly provided with a handle (704) on the opposite side.

3. A ventilation system with fire-fighting function according to claim 1, characterized in that: The two adjustment components (6) include two electric push rods (607), two first limit rods (605), two first ropes (604) and a buffer groove (606), the two buffer grooves (606) are fixedly provided with sliding rods (603) on both sides thereof, the two buffer grooves (606) are fixedly provided with a shock absorber (602) in the middle of the inner bottom surface, and the two first ropes (604) are fixedly connected with an extrusion plate (601) on the opposite side thereof.

4. A ventilation system with fire-fighting function according to claim 2, characterized in that: The two extrusion rods (707) are respectively slidably sleeved inside the two extrusion sleeves (703), and the two strong springs (705) are respectively fixedly connected to the two extrusion rods (707).

5. A ventilation system with fire-fighting function according to claim 2, characterized in that: The four second ropes (709) slide around the four second limiting rods (708) respectively, and the two clamping blocks (701) are respectively clamped and arranged inside the two clamping slots (13).

6. A ventilation system with fire-fighting function according to claim 1, characterized in that: The two sliding blocks (15) are respectively slidably arranged inside the four sliding grooves (17), and holding rods (16) are fixedly arranged on both sides of the lower end surface of the filter plate (14).

7. A ventilation system with fire-fighting function according to claim 1, characterized in that: The exhaust fan (9) is fixedly connected to an exhaust duct (3) and passes through the tunnel body (1), and the opposite sides of the two intake fans (4) are fixedly connected to intake ducts (2) and pass through the tunnel body (1).

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