A fire-fighting fan protection installation structure for a building

Abstract

The present invention provides a protective installation structure for fire-fighting fans in building buildings, which is applied to the field of mechanical pump technology. By setting a mounting piece, two fixing blocks are clamped close to each other on the outside of the fire-fighting fan to achieve preliminary fixation. By clamping the mounting ring between the fixing block and the fixing ring, complete fixation is achieved, and the protective net is more stably installed on the fire-fighting fan. The protective net protects the air outlet of the fire-fighting fan to prevent mice, garbage and impurities from entering the fan. By setting an automatic opening piece, when a fire occurs, the wind force when the fan is started can release the fixation of the protective net, and the protective net is automatically opened, so that the resistance of the fire-fighting fan to exhaust smoke is smaller and the smoke exhaust effect is better. By setting a movable connecting column, the lock between the protective net can be automatically released when the automatic opening piece is stuck, so that the protective net can still be opened when the automatic opening piece is stuck, and the unimpeded discharge of smoke can always be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical pumps, and in particular to a protective installation structure for fire-fighting fans in buildings. Background Art

[0002] A fire fan is a ventilation device used for ventilation and smoke exhaust when a fire occurs. Its main function is to force air flow, thereby achieving ventilation and smoke exhaust. A fire fan is usually driven by an electric motor. When the power supply system fails, the equipped engine can automatically start in a short time and continue to drive the fan to ensure the normal operation of the mechanical smoke prevention and exhaust system.

[0003] In modern buildings, fire fans are essential firefighting equipment. Since fire fans are usually installed on the roof or outdoor platform, the air outlet of the fire fan is often directly connected to the outdoor environment. The outdoor environment is relatively complex, and garbage and other impurities are often blown into the fan, thereby affecting the normal operation of the fire fan. There are even mice that get into the fire fan and gnaw on the internal wiring of the fire fan, causing damage to the fire fan. In the existing technology, a relatively sparse wire mesh is usually used to seal the outlet of the fire fan. Although this can keep large pieces of garbage out, it is still not a good idea to use a wire mesh to block the outlet of the fire fan. It can block them outside and does not affect smoke exhaust, but some smaller garbage and rats cannot be blocked, and the fire fan is often damaged. Once a fire occurs during the period of fire fan damage, the consequences are disastrous. When using a denser wire mesh to seal the fire fan outlet, although it can block smaller garbage and rats, in the event of a fire, the denser wire mesh will increase the resistance to smoke exhaust, thereby greatly reducing the smoke exhaust speed, which will increase the smoke concentration in the building, which is not conducive to people's escape and increases the safety risk of escaping personnel.

[0004] To this end, we propose a building fire fan protection installation structure to solve the above problems. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] In response to the problems existing in the prior art, the purpose of this application is to set up a denser protective net to protect the air outlet of the fire-fighting fan to prevent impurities such as rats and garbage from entering. When a fire occurs, the wind force of the fan and the heat of the smoke are used to automatically open the protective net to ensure that the smoke is discharged smoothly. Compared with the prior art, a protective installation structure for fire-fighting fans in a building is provided. By setting mounting parts, the protective net is installed on the fire-fighting fan. By setting automatic opening parts, the protective net is automatically opened in the event of a fire to ensure that the smoke is discharged smoothly. By setting movable connecting parts, the protective net can still be opened even if the automatic opening parts are stuck, so as to always ensure that the smoke can be discharged smoothly.

[0007] 2. Technical solution

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0009] A fire-fighting fan protection installation structure for a building comprises a fire-fighting fan, wherein one end of the fire-fighting fan close to the air outlet is fixedly connected to a mounting ring, a fixing ring is fitted on the outer side of the mounting ring, and mounting parts are provided on both the left and right ends of the fixing ring;

[0010] The mounting member comprises an L-shaped plate, a limiting rod, a fixing block and a spring;

[0011] The L-shaped plate is fixedly connected to the fixing ring, one end of the limiting rod passes through the L-shaped plate and is slidably connected to the L-shaped plate, the other end of the limiting rod is fixedly connected to the fixing block, the spring is sleeved on the outside of the limiting rod, and the spring is fixedly connected between the L-shaped plate and the fixing block.

[0012] Furthermore, the mounting member further comprises a first limiting block, a second limiting rod, a second fixing block, a threaded rod and a second limiting block;

[0013] The limit block 1 is fixedly connected to the fixed block 1, the limit rod 2 passes through the limit block 1 and is slidably connected to the limit block 1, the fixed block 2 is fixedly connected to the limit rod 2, the threaded rod is rotatably connected to the fixed block 2, and the limit block 2 is threadedly connected to the threaded rod.

[0014] Furthermore, one end of the limiting rod 1 away from the fixing block 1 is fixedly connected to a stopper, two limiting rods 1 and stoppers are provided on the L-shaped plate, and a handle is fixedly connected between the two stoppers.

[0015] Furthermore, both the first and second fixing blocks are fixedly connected with anti-skid pads, which are made of rubber anti-skid material.

[0016] Furthermore, one of the L-shaped plates is rotatably connected to a protective ring via hinge 1, a locking device is provided between the protective ring and the other L-shaped plate, the bottom of the protective ring is rotatably connected to a protective net via hinge 2, an automatic opening part is provided between the top of the protective net and the protective ring, an annular airbag is embedded and installed on the protective ring, and the annular airbag is in contact with the upper edge of the protective net.

[0017] Furthermore, the automatic opening member includes a mounting frame, a baffle, a sliding frame, a locking block, a rotating rod, a wind-catching plate and a square airbag;

[0018] The mounting frame is fixedly connected to the inner wall of the protective ring, the baffle is fixedly connected to the side of the mounting frame close to the protective net, the sliding frame is slidably connected to the mounting frame, both ends of the sliding frame are provided with locking grooves, the locking block is slidably connected to the locking groove, the rotating rod is rotatably connected to the locking block, the locking block, locking groove and rotating rod are each provided with two and are symmetrically arranged about the mounting frame, the two rotating rods are rotatably connected at one end thereof, and the two rotating rods are elastically connected at one end thereof by a torsion spring, the wind catcher is fixedly connected to one of the rotating rods, the square airbag is fixedly connected on both sides of the inner wall of the mounting frame, and the position of the square airbag corresponds to that of the locking block.

[0019] Furthermore, the wind-catching plate is arc-shaped, and the opening of the wind-catching plate faces the fire-fighting fan.

[0020] Furthermore, a mounting plate is fixedly connected to the protective net, a connecting column is provided between the mounting plate and the sliding frame, a slide groove 1 is provided on the mounting plate, and a slide groove 2 is provided on the side of the sliding frame close to the mounting plate, and the two ends of the connecting column are slidingly connected to the mounting plate and the sliding frame through slide groove 1 and slide groove 2 respectively.

[0021] Furthermore, a piston cylinder is fixedly connected to the mounting plate, and an output end of the piston cylinder is fixedly connected to a connecting column.

[0022] Compared with the existing technology, the advantages of this application are:

[0023] (1) By setting the mounting parts, during installation, the handle is pulled to drive the fixing block 1 close to the L-shaped plate, so that the distance between the two fixing blocks 1 becomes larger, and then the fixing ring is fitted with the mounting ring of the fire fan, and then the handle is released, and the two fixing blocks 1 are driven close to each other under the elastic force of the spring, and clamped on the outside of the fire fan to achieve preliminary fixation, and then the threaded rod is rotated, and under the limiting action of the limiting rod 2, the fixing plate 2 moves toward the mounting ring, and the mounting ring is clamped between the fixing block 2 and the fixing ring to achieve complete fixation. By clamping and installing the fixing block 1 and the fixing block 2 from two directions, the protective net can be installed on the fire fan more stably. The protective net protects the air outlet of the fire fan and can prevent rats and garbage impurities from entering the fan, thereby playing a protective role. In addition, the equipment can be installed on the existing fire fan and can be used without replacing the fire fan, thereby making the device more adaptable.

[0024] (2) By setting an automatic opening part, when a fire occurs, the fire fan is started. Under the huge wind force of the fire fan, the wind catcher and the rotating rod are blown, causing the rotating rod to rotate, thereby pulling the locking blocks on both sides to move into the sliding frame through the rotating rod. At the same time, the smoke heats the square airbag, causing the square airbag to expand and squeeze the locking block, so that the locking block can be retracted into the sliding frame more quickly, and the restriction between the locking block and the baffle is lost. At this time, the restriction between the sliding frame and the mounting frame is also lost. Under the elastic action of the expanded annular airbag, the protective net is ejected, causing the protective net to automatically rotate and open, thereby making the smoke exhaust resistance of the fire fan smaller, smoother, and the smoke exhaust effect better.

[0025] (3) The piston cylinder is provided to drive the connecting column to move upward. Since the occurrence of fire is very accidental, when a fire occurs, if the parts in the automatic opening part are blocked by impurities or aged and cannot move or rotate, the protective net cannot be rotated and opened. However, the temperature of the smoke continuously discharged at this time is high, which can heat the piston cylinder. The output end of the heated piston cylinder extends, driving the connecting column to slide upward in the first and second slide grooves until the connecting column and the second slide groove are no longer constrained. At this time, the connecting column is separated from the sliding frame, and the protective net can be driven to pop out under the elastic action of the annular airbag, so that the protective net can still be opened when the automatic opening part is stuck, and the smoke can always be discharged unimpeded.

[0026] (4) By arranging anti-skid pads made of rubber anti-skid material on the fixing block 1 and the fixing block 2, the friction between the fixing block 1 and the fixing block 2 and the fire-fighting fan can be increased, thereby improving the stability of the installation.

[0027] (5) By setting a handle, the fixed block can be pulled apart to facilitate disassembly and assembly.

[0028] (6) By arranging a torsion spring between the two rotating rods, the elastic force of the torsion spring can keep the rotating rod in a straight state, pushing out the locking block, so that the protective net and the protective ring can fit tightly.

[0029] (7) By providing an arc-shaped wind-catching plate, the arc shape can increase the area of ​​the wind-catching plate, so that the fire-fighting fan exerts a greater force on the wind-catching plate when blowing, making it easier for the rotating rod to rotate.

[0030] (8) By setting up a square airbag, the square airbag will expand when heated and squeeze the locking block, which can accelerate the contraction of the locking block, thereby enabling the protective net to open more quickly.

[0031] (9) By setting up an annular airbag, the smoke can heat the annular airbag, causing it to expand, thereby squeezing the upper edge of the protective net. When the locking block loses its restriction, the expanded annular airbag can pop out the protective net, allowing the protective net to open quickly.

[0032] (10) By setting a locking device, the protective net can be opened horizontally, which is convenient for daily inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of the front of this application;

[0034] Figure 2 This is a schematic diagram of the overall structure on the back of this application;

[0035] Figure 3 For this application Figure 2 A local enlarged view of the structure at point A;

[0036] Figure 4 Open the status structure diagram during routine maintenance for this application;

[0037] Figure 5 This is a schematic diagram of the structure of the open state when applying for fire;

[0038] Figure 6 For this application Figure 5 A local enlarged view of the structure at point B in FIG;

[0039] Figure 7 This is a schematic diagram of the automatic opening structure of this application;

[0040] Figure 8 This is a partial cross-sectional structural diagram of the automatic opening member of this application;

[0041] Figure 9 This is a schematic diagram of the mounting plate and piston cylinder structure of this application.

[0042] Description of the numbers in the figure:

[0043] 1. Fire fan; 2. Mounting ring; 3. Fixing ring; 4. Mounting part; 401. L-shaped plate; 402. Limit rod 1; 403. Fixing block 1; 404. Spring; 405. Limit block 1; 406. Limit rod 2; 407. Fixing block 2; 408. Threaded rod; 409. Limit block 2; 410. Handle; 411. Anti-slip pad; 5. Hinge 1; 6. Protective ring; 7. Locking device; 8. Protective net; 9. Automatic opening part; 901. Mounting frame; 902. Baffle; 903. Sliding frame; 904. Locking block; 905. Rotating rod; 906. Wind catcher; 907. Square airbag; 10. Mounting plate; 11. Connecting column; 12. Hinge 2; 13. Annular airbag; 14. Slide groove 1; 15. Slide groove 2; 16. Piston cylinder. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] Example 1:

[0046] The present invention provides a building fire fan protection installation structure, please refer to Figure 1-9 , including a fire-fighting fan 1, one end of the fire-fighting fan 1 close to the air outlet is fixedly connected to a mounting ring 2, a fixing ring 3 is fitted on the outside of the mounting ring 2, and mounting parts 4 are provided at both ends of the fixing ring 3, and the mounting parts 4 include an L-shaped plate 401, a limiting rod 1 402, a fixing block 1 403 and a spring 404. The L-shaped plate 401 is fixedly connected to the fixing ring 3, one end of the limiting rod 1 402 passes through the L-shaped plate 401 and is slidably connected to the L-shaped plate 401, the other end of the limiting rod 1 402 is fixedly connected to the fixing block 1 403, and the end of the limiting rod 1 402 away from the fixing block 1 403 is fixedly connected with a stopper, two limiting rods 1 402 and a stopper are provided on the L-shaped plate 401, and a handle 410 is fixedly connected between the two stops, and the handle 410 can pull the fixing block 1 403 apart for easy disassembly and assembly, and the spring 404 is sleeved on the limiting rod 1 402. On the outside, the spring 404 is fixedly connected between the L-shaped plate 401 and the fixed block 1 403. The mounting part 4 also includes a limit block 1 405, a limit rod 2 406, a fixed block 2 407, a threaded rod 408 and a limit block 2 409. The limit block 1 405 is fixedly connected to the fixed block 1 403. The limit rod 2 406 passes through the limit block 1 405 and is slidably connected to the limit block 1 405. The fixed block 2 407 is fixedly connected to the limit rod 2 406. The fixed block 1 403 and the fixed block 2 407 are both fixedly connected with an anti-slip pad 411. The anti-slip pad 411 is made of rubber anti-slip material. The anti-slip pad 411 can increase the friction between the fixed block 1 403 and the fixed block 2 407 and the fire fan 1, thereby improving the stability of the installation. The threaded rod 408 is rotatably connected to the fixed block 2 407, and the limit block 2 409 is threadedly connected to the threaded rod 408.

[0047] Specifically, during installation, the handle 410 is pulled to drive the fixing block 1 403 closer to the L-shaped plate 401, so that the distance between the two fixing blocks 1 403 becomes larger, and then the fixing ring 3 is fitted with the mounting ring 2 of the fire-fighting fan 1. After that, the handle 410 is released, and the two fixing blocks 1 403 are driven closer to each other under the elastic force of the spring 404, clamped on the outer side of the fire-fighting fan 1, to achieve preliminary fixation, and then the threaded rod 408 is rotated. Under the limiting action of the limiting rod 2 406, the fixing block 2 407 moves toward the mounting ring 2, clamping the mounting ring 2 between the fixing block 2 407 and the fixing ring 3 to achieve complete fixation. By clamping and installing from two directions by the fixing block 1 403 and the fixing block 2 407, the protective net 8 can be more stably installed on the fire-fighting fan 1, and the equipment can be installed on the existing fire-fighting fan 1 through the mounting part 4, and the fire-fighting fan 1 does not need to be replaced, thereby making the device more adaptable.

[0048] One of the L-shaped plates 401 is connected to a protective ring 6 by a hinge 1 5, and a locking device 7 is provided between the protective ring 6 and the other L-shaped plate 401. The locking device 7 can horizontally open the protective net for easy routine inspection and maintenance. The bottom of the protective ring 6 is connected to a protective net 8 by a hinge 2 12. An automatic opening member 9 is provided between the top of the protective net 8 and the protective ring 6. An annular airbag 13 is embedded and installed on the protective ring 6. The annular airbag 13 fits the upper edge of the protective net 8. The flue gas can heat the annular airbag 13, so that the annular airbag 13 is opened. The airbag 13 expands, thereby squeezing the upper edge of the protective net 8. When the locking block 904 loses its restriction, the expanded annular airbag 13 can pop out the protective net 8. The automatic opening part 9 includes a mounting frame 901, a baffle 902, a sliding frame 903, a locking block 904, a rotating rod 905, a wind-catching plate 906 and a square airbag 907. The mounting frame 901 is fixedly connected to the inner wall of the protective ring 6, the baffle 902 is fixedly connected to the side of the mounting frame 901 close to the protective net 8, the sliding frame 903 is slidably connected to the mounting frame 901, and both ends of the sliding frame 903 are open. The locking block 904 is provided with a locking groove, the locking block 904 is slidably connected to the locking groove, and the rotating rod 905 is rotatably connected to the locking block 904. The locking block 904, the locking groove and the rotating rod 905 are each provided with two and are symmetrically arranged about the mounting frame 901. The two rotating rods 905 are rotatably connected at one end thereof, and the two rotating rods 905 are elastically connected at one end thereof by a torsion spring. The elastic force of the torsion spring can keep the rotating rod 905 in a straight line state, and push the locking block 904 out, so that the protective net 8 can fit tightly with the protective ring 6. The wind-catching plate 906 is fixedly connected to one of the rotating rods 905, so as to catch the wind. The plate 906 is arc-shaped, and the opening of the wind-catching plate 906 faces the fire-fighting fan 1. The arc shape can increase the area of ​​the wind-catching plate 906, so that the fire-fighting fan 1 exerts greater force on the wind-catching plate 906 when blowing, making it easier for the rotating rod 905 to rotate. The square airbag 907 is fixedly connected to both sides of the inner wall of the mounting frame 901. The position of the square airbag 907 corresponds to that of the locking block 904. The square airbag 907 expands due to heat and squeezes the locking block 904, which can accelerate the contraction of the locking block 904, thereby enabling the protective net 8 to be opened more quickly.

[0049] Specifically, when a fire occurs, the fire-fighting fan 1 is started. Under the huge wind force of the fire-fighting fan 1, the wind-catching plate 906 and the rotating rod 905 are blown, causing the rotating rod 905 to rotate, thereby pulling the locking blocks 904 on both sides to move toward the inside of the sliding frame 903 through the rotating rod 905. At the same time, the smoke heats the square airbag 907, causing the square airbag 907 to expand and squeeze the locking block 904, so that the locking block 904 can shrink more quickly into the inside of the sliding frame 903, and the locking block 904 and the baffle 902 lose their restrictive effect. At this time, the sliding frame 903 and the mounting frame 901 also lose their restrictive effect, and the protective net 8 is ejected under the elastic action of the expanded annular airbag 13, so that the protective net 8 automatically rotates and opens, thereby making the smoke exhaust resistance of the fire-fighting fan 1 smaller, smoother, and the smoke exhaust effect better.

[0050] A mounting plate 10 is fixedly connected to the protective net 8, and a connecting column 11 is provided between the mounting plate 10 and the sliding frame 90. A slide groove 14 is provided on the mounting plate 10, and a slide groove 2 15 is provided on the side of the sliding frame 903 close to the mounting plate 10. Both ends of the connecting column 11 are slidingly connected to the mounting plate 10 and the sliding frame 903 through the slide groove 14 and the slide groove 2 15 respectively. The slide groove 14 and the slide groove 2 15 have the same shape, and a larger circular space is provided at the upper end to facilitate the installation and separation of the connecting column 11. A piston cylinder 16 is fixedly connected to the mounting plate 10, and the output end of the piston cylinder 16 is fixedly connected to the connecting column 11. The piston cylinder 16 can be heated when the smoke is discharged, and the piston cylinder 16 is sealed and filled with inert gas.

[0051] Specifically, since the occurrence of fire is very accidental, when a fire occurs, if the parts in the automatic opening part 9 are stuck by impurities or aged and cannot move or rotate, the protective net 8 cannot be rotated open. However, the temperature of the smoke continuously discharged at this time is relatively high, which can heat the piston cylinder 16. The output end of the heated piston cylinder 16 extends, driving the connecting column 11 to slide upward in the slide groove 14 and the slide groove 2 15 until the connecting column 11 and the slide groove 2 15 are no longer constrained and detached from the slide groove 2 15. At this time, the connecting column 11 is separated from the sliding frame 903, and the elastic action of the annular airbag 13 can drive the protective net 8 to pop out, so that the protective net 8 can still be opened when the automatic opening part 9 is stuck, and the unimpeded discharge of smoke can always be guaranteed.

[0052] Working principle: Select equipment that matches the specifications of the fan. During installation, pull the handle 410 to drive the fixing block 1 403 close to the L-shaped plate 401, so that the distance between the two fixing blocks 1 403 becomes larger, and then fit the fixing ring 3 with the installation ring 2 of the fire fan 1. After that, release the handle 410, and under the elastic force of the spring 404, drive the two fixing blocks 1 403 close to each other, clamp them on the outside of the fire fan 1, and achieve preliminary fixation. Then rotate the threaded rod 408, and under the limiting action of the limiting rod 2 406, the fixing block 2 407 moves toward the installation ring 2 , clamp the mounting ring 2 between the second fixing block 407 and the fixing ring 3 to achieve complete fixation. By clamping and installing from two directions by the fixing block 1 403 and the second fixing block 407, the protective net 8 can be more stably installed on the fire-fighting fan 1. The protective net 8 protects the air outlet of the fire-fighting fan 1, which can prevent mice, garbage and impurities from entering the fan, thereby achieving a protective effect. In addition, the device can be installed on the existing fire-fighting fan 1 through the mounting piece 4, and there is no need to replace the fire-fighting fan 1, thereby making the device more adaptable.

[0053] During routine maintenance, the locking device can be opened to open the protective net horizontally, which is convenient for daily inspection and maintenance (the locking device is a prior art and will not be elaborated here);

[0054] When a fire occurs, the fire-fighting fan 1 is started. Under the huge wind force of the fire-fighting fan 1, the wind-catching plate 906 and the rotating rod 905 are blown, causing the rotating rod 905 to rotate, thereby pulling the locking blocks 904 on both sides to move into the inside of the sliding frame 903 through the rotating rod 905. At the same time, the smoke heats the square airbag 907, causing the square airbag 907 to expand and squeeze the locking block 904, so that the locking block 904 can be more quickly retracted into the inside of the sliding frame 903, so that the restriction between the locking block 904 and the baffle 902 is lost. At this time, the restriction between the sliding frame 903 and the mounting frame 901 is also lost. Under the elastic action of the expanded annular airbag 13, the protective net 8 is ejected, causing the protective net 8 to automatically rotate and open, thereby making the smoke exhaust resistance of the fire-fighting fan 1 smaller, smoother, and the smoke exhaust effect better;

[0055] If the parts in the automatic opening part 9 are stuck by impurities or are aged and cannot move or rotate, the protective net 8 cannot be rotated open. However, the temperature of the flue gas continuously discharged at this time is high, which can heat the piston cylinder 16. The output end of the heated piston cylinder 16 extends, driving the connecting column 11 to slide upward in the slide groove 14 and the slide groove 2 15 until the connecting column 11 and the slide groove 2 15 are no longer constrained and detach from the slide groove 2 15. At this time, the connecting column 11 is separated from the sliding frame 903, and the elastic action of the annular airbag 13 can drive the protective net 8 to pop out, so that the protective net 8 can still be opened when the automatic opening part 9 is stuck, and the unimpeded discharge of smoke can always be guaranteed.

[0056] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed in the present application based on the technical solution and its improved ideas, which should be covered by the scope of protection of the present application.

Claims

1. A fire-fighting fan protection installation structure for a building, comprising a fire-fighting fan (1), wherein one end of the fire-fighting fan (1) close to the air outlet is fixedly connected to a mounting ring (2), characterized in that: A fixing ring (3) is fitted on the outer side of the mounting ring (2), and mounting parts (4) are provided on both left and right ends of the fixing ring (3); The mounting member (4) comprises an L-shaped plate (401), a limiting rod (402), a fixing block (403) and a spring (404); The L-shaped plate (401) is fixedly connected to the fixing ring (3); one end of the limiting rod (402) passes through the L-shaped plate (401) and is slidably connected to the L-shaped plate (401); the other end of the limiting rod (402) is fixedly connected to the fixing block (403); the spring (404) is sleeved on the outside of the limiting rod (402), and the spring (404) is fixedly connected between the L-shaped plate (401) and the fixing block (403); One of the L-shaped plates (401) is rotatably connected to a protective ring (6) via a hinge (5), a locking device (7) is provided between the protective ring (6) and the other L-shaped plate (401), the bottom of the protective ring (6) is rotatably connected to a protective net (8) via a hinge (12), an automatic opening member (9) is provided between the top of the protective net (8) and the protective ring (6), an annular airbag (13) is embedded and installed on the upper part of the protective ring (6), and the annular airbag (13) is in contact with the upper edge of the protective net (8); The automatic opening member (9) comprises a mounting frame (901), a baffle (902), a sliding frame (903), a locking block (904), a rotating rod (905), a wind-catching plate (906) and a square air bag (907); The installation frame (901) is fixedly connected to the inner wall of the protective ring (6), the baffle (902) is fixedly connected to the side of the installation frame (901) close to the protective net (8), the sliding frame (903) is slidably connected to the installation frame (901), both ends of the sliding frame (903) are provided with locking grooves, the locking block (904) is slidably connected to the locking groove, the rotating rod (905) is rotatably connected to the locking block (904), the locking block (904), the locking groove and the rotating rod (905) are provided with two and are symmetrically arranged with respect to the installation frame (901), the two rotating rods (905) are connected at one end thereof and are connected in rotation, and the two rotating rods (905) are elastically connected at one end thereof by a torsion spring, the wind-catching plate (906) is fixedly connected to one of the rotating rods (905), the square airbag (907) is fixedly connected to both sides of the inner wall of the installation frame (901), and the position of the square airbag (907) corresponds to that of the locking block (904); The wind-catching plate (906) is arc-shaped, and the opening of the wind-catching plate (906) faces the fire-fighting fan (1); The protective net (8) is fixedly connected to a mounting plate (10), a connecting column (11) is provided between the mounting plate (10) and the sliding frame (903), a first slide groove (14) is provided on the mounting plate (10), a second slide groove (15) is provided on a side of the sliding frame (903) close to the mounting plate (10), and both ends of the connecting column (11) are slidably connected to the mounting plate (10) and the sliding frame (903) through the first slide groove (14) and the second slide groove (15) respectively; A piston cylinder (16) is fixedly connected to the mounting plate (10), and an output end of the piston cylinder (16) is fixedly connected to a connecting column (11).

2. A fire-fighting fan protection installation structure for a building according to claim 1, characterized in that: The mounting member (4) further comprises a first limiting block (405), a second limiting rod (406), a second fixing block (407), a threaded rod (408) and a second limiting block (409); The limiting block 1 (405) is fixedly connected to the fixed block 1 (403), the limiting rod 2 (406) passes through the limiting block 1 (405) and is slidably connected to the limiting block 1 (405), the fixed block 2 (407) is fixedly connected to the limiting rod 2 (406), the threaded rod (408) is rotatably connected to the fixed block 2 (407), and the limiting block 2 (409) is threadedly connected to the threaded rod (408).

3. A fire-fighting fan protection installation structure for a building according to claim 1, characterized in that: One end of the limiting rod 1 (402) away from the fixing block 1 (403) is fixedly connected to a stopper, and two limiting rods 1 (402) and stoppers are provided on the L-shaped plate (401), and a handle (410) is fixedly connected between the two stoppers.

4. A fire-fighting fan protection installation structure for a building according to claim 2, characterized in that: The fixing block 1 (403) and the fixing block 2 (407) are both fixedly connected with an anti-skid pad (411), and the anti-skid pad (411) is made of rubber anti-skid material.

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