A flag blowing system

Abstract

The present invention discloses a flag blowing system, which belongs to the technical field of stage equipment, and includes a flagpole, a traction rope, a flag, and a blower, wherein the flagpole is a tubular structure, and an air outlet is provided on the flagpole; the traction rope is arranged on the flagpole and is arranged opposite to the air outlet; the flag is connected to the traction rope, and the air outlet is adapted to the flag and is used to blow air to make the flag float; a hard rod is provided on the flag, and the hard rod is used to control the airflow balance on both sides of the flag; the blower is connected to the flagpole and is used to blow air into the flagpole. The flagpole of the flag blowing system provided by the present invention drives the flag to rise and fall through the annular transmission of the traction rope, and during the rising process of the flag, the blower is turned on, and the blower generates airflow, and the airflow is ejected through the air outlet to make the flag float. The present invention effectively overcomes the problem that the flag is not stretched and floated enough during blowing, and also effectively reduces the probability of the flag being unable to float after being entangled in the wire rope, and has a significant effect, and is suitable for wide promotion.

Description

Technical Field

[0001] The invention relates to the technical field of stage equipment, and in particular to a flag blowing system. Background Art

[0002] During the opening and closing ceremonies of the Beijing Winter Olympics, the Olympic flag was hoisted using a soft flag (five hook holes were set on the soft flag trousers, and the soft flag was connected to the flagpole through five locks). The national flag was hoisted using a steel pipe set inside the flag trousers, which was connected to the flagpole. In previous large-scale events, flags were hoisted using hard flags. In order to ensure that the flagpole system of the Winter Olympics projects is blown, the flag flutters more freely and lightly. When the soft flag is hoisted, the fluttering effect of the flag is not very good, and it cannot achieve the fluttering effect of the hard flag under the same environmental conditions. It is also easy for the flag to be caught in the steel wire rope and cannot flutter normally.

[0003] In summary, a flag blowing system is designed to solve the problems in the prior art that hard flags have poor blowing effects when used, and soft flags are easily entangled in steel wire ropes when used, resulting in inability to flutter normally, and cannot simultaneously meet the requirements of normal fluttering and stretched and light blowing effects. Summary of the invention

[0004] In view of the above defects, the technical problem solved by the present invention is to provide a flag blowing system to solve the problems existing in the prior art that hard flags have poor blowing effects when used, and soft flags are easily entangled in steel wire ropes when used, resulting in the inability to flutter normally, and the inability to simultaneously meet the requirements of normal fluttering and stretched and light blowing effects.

[0005] The present invention provides a flag blowing system, comprising:

[0006] The flagpole is a tubular structure, and an air outlet is provided on the flagpole;

[0007] A traction rope is arranged on the flagpole and is arranged opposite to the air outlet;

[0008] A flag is connected to the traction rope, the air outlet is adapted to the flag and is used to blow air to make the flag float. A hard rod is provided on the flag, the length of the hard rod is smaller than the width of the flag, and is used to control the airflow balance on both sides of the flag;

[0009] A blower is connected to the flagpole and is used for blowing air into the flagpole.

[0010] Preferably, the flagpole comprises:

[0011] A rod body is connected to the blower and one end of which is fixed on the foundation, the air outlet is arranged on the rod body, and the air outlet is arranged away from the foundation;

[0012] A blocking member, disposed at the other end of the rod body, for blocking the air flowing in the rod body;

[0013] A first pulley is rotatably connected to the rod body and is disposed at one end of the rod body close to the blocking member;

[0014] A second pulley is rotatably connected to the rod body and is disposed close to the foundation, and the traction rope is disposed between the first pulley and the second pulley;

[0015] A locking ratchet is connected to the rod body and the traction rope at the same time, and is used to limit the movement of the traction rope.

[0016] Preferably, the flag comprises:

[0017] The flag body is connected to the hard rod, and a plurality of hook holes are arranged side by side on one side of the flag body, and the hard rod is arranged between two of the hook holes;

[0018] A lock buckle, connected to the flag body through the hook hole and detachably connected to the traction rope, for fixing the flag body on the traction rope;

[0019] A windproof chain is connected to the traction rope and is sleeved on the flagpole.

[0020] Preferably, the hard rod is arranged at a lower middle position of the flag body; the length of the hard rod is one quarter of the width of the flag body.

[0021] Preferably, the windproof chains are arranged in one-to-one correspondence with the hook holes, and two air outlets are provided, one of which is arranged at a position opposite to the hard rod, and the other air outlet is arranged below the bottom of the flag body.

[0022] Preferably, the hard rod is provided with one, one end of which is arranged at the midpoint of the flag body on one side close to the rod body, and the other end extends toward the direction of the foundation; or / and the hook holes are provided with five and are equidistantly arranged on the flag body.

[0023] Preferably, the air outlet is an opening inclined upwardly and arranged on the rod body; the lock buckle corresponds to the hook hole one by one, the lock buckle located in the middle of the flag body is vertically arranged to the rod body, the angle between the lock buckle located at the upper part of the flag body and the rod body is an obtuse angle, and the angle between the lock buckle located at the lower part of the flag body and the rod body is an acute angle.

[0024] Preferably, the flagpole also includes a limiting assembly fixedly connected to the pole body; the traction rope includes a plurality of traction monomers, the cross-section of the traction monomers is rectangular, and adjacent traction monomers are rotatably connected; the limiting assembly is adaptively arranged with the traction monomers to limit the circumferential rotation of the traction rope along the traction rope.

[0025] Preferably, the limiting component comprises:

[0026] A limiting bracket connected to the rod body, the limiting bracket is provided with a through slot, a through hole and a limiting hole, the through slot is connected to the limiting hole and is vertically arranged, the through slot and the through hole are parallel to the traction rope and are adaptively arranged, and the through hole is arranged on one side of the through slot;

[0027] A limit block is arranged in the limit hole and extends into the passing groove. The limit block is slidably connected with the limit bracket. The limit block is provided with a limit groove adapted to the traction unit. The limit block is also provided with an inclined surface for facilitating the flag to pass through.

[0028] An elastic body, which is arranged in the limiting hole and connected to the limiting block and the limiting bracket at the same time, and is used to provide a rebound force for the limiting block;

[0029] A first sensing element connected to one end of the limiting block close to the limiting hole;

[0030] The second sensor is arranged at one end of the limit hole away from the limit block and is electrically connected to the first sensor and the blower to control the opening and closing of the blower.

[0031] Preferably, several limiting assemblies are arranged along the axial direction of the rod body; the traction rope also includes a fixing block, which is fixedly connected to several of the traction units and detachably connected to the flag, and the cross-sections of both ends of the fixing block are triangular and are adapted to the limiting blocks, and the inclined surface is adapted to the shape of the fixing block.

[0032] It can be seen from the above scheme that the flag blowing system provided by the present invention is applied to stage performances, so that the flag can be blown more stretched and light when in use, effectively overcoming the problem that the flag is not stretched enough and flutters when blowing, and effectively reducing the probability of the flag being entangled in the steel wire rope and being unable to flutter after being entangled. By adding a hard rod to the flag pants of the flag, the position relationship of the entire flag pants relative to the air outlet is relatively consistent, the airflow passes evenly through both sides of the flag pants, and the air pressure on both sides of the flag pants is relatively consistent, so that the flag flutters more stretched, effectively solving the problem of the flag being folded and entangled in the steel wire rope when flying in major performances. When blowing the flag, the flag flutters more stretched, achieving almost the same effect as when the hard flag is blown. In view of the problem of performance guarantee of stage mechanical equipment, due to the adoption of a multi-level redundant structure, the risk of unexpected equipment conditions affecting the performance effect is minimized, and the reliability of the equipment when in use is improved. The system has the advantages of strong operability, safety, and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A structural schematic diagram of a flag blowing system provided by the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0036] Figure 3 A schematic diagram of the structure of an air outlet of a flag blowing system provided by the present invention;

[0037] Figure 4 A schematic structural diagram of another flag blowing system provided by the present invention;

[0038] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0039] Figure 6 A structural schematic diagram of another flag blowing system provided by the present invention;

[0040] Figure 7 For along Figure 6 Schematic diagram of the cross-sectional structure of the middle DD line;

[0041] Figure 8 For along Figure 6 Schematic diagram of the cross-sectional structure of the CC line;

[0042] Fig. 9 This is a comparison chart of the blowing effects of existing soft flags and hard flags;

[0043] Fig.10 A comparison diagram of the effects of a flag blowing system and a hard flag blowing system provided by the present invention.

[0044] Figure 1-10 middle:

[0045] 1. Flagpole; 2. Towing rope; 3. Flag; 4. Blower; 5. Hard pole; 6. Foundation; 7. Rotating mechanism; 11. Rod body; 12. Sealing piece; 13. Limiting assembly; 21. Fixing block; 31. Flag body; 32. Locking buckle; 33. Windproof chain; 111. Air outlet; 131. Limiting bracket; 132. Limiting block; 133. Elastomer; 134. First sensing element; 135. Second sensing element; 311. Hook hole; 1311. Through slot; 1312. Through hole; 1313. Limiting hole; 1321. Limiting groove; 1322. Inclined surface. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Please also read Figures 1 to 3 Now, a specific implementation of a flag blowing system provided by the present invention is described. The flag blowing system includes a flagpole 1, a traction rope 2, a flag 3, and a blower 4, wherein the flagpole 1 is a tubular structure, and an air outlet 111 is provided on the flagpole 1; the traction rope 2 is arranged on the flagpole 1 and is arranged opposite to the air outlet 111; the flag 3 is connected to the traction rope 2, and the air outlet 111 is adapted to the flag 3 and is used to blow air to make the flag 3 float. A hard rod 5 is provided on the flag 3, and the length of the hard rod 5 is less than the width of the flag 3, which is used to control the air flow balance on both sides of the flag 3; the blower 4 is connected to the flagpole 1 and is used to blow air into the flagpole 1. The flagpole 1 drives the flag 3 to rise and fall through the circular transmission of the traction rope 2. During the rising process of the flag 3, the blower 4 is turned on, and the blower 4 generates airflow, which passes through the internal cavity of the flagpole 1 and the two air outlets 111 at the top of the flagpole 1, and the airflow is ejected to make the flag 3 float.

[0048] For illustration purposes, see Figure 1, take any point in space as the origin, the setting direction of the flagpole 1 as the Z axis, the length direction of the flag 3 as the X axis, and the straight line direction perpendicular to both the X axis and the Z axis as the Y axis to establish a rectangular coordinate system, wherein the XY plane is a horizontal plane, the direction indicated on the horizontal plane is the horizontal direction, the direction indicated by the Z axis is the vertical direction, the setting direction of the blocking member 12 in the flagpole 1 relative to the pole body 11 is the positive direction of the Z axis, the positive direction of the Z axis indicates the direction upward, and vice versa.

[0049] Flag 3 flutters in the wind, which is the result of the interaction between the soft shape of the structure and the air. This type of problem involves the coupling of flexible bodies and fluids. The shape of the flexible body changes over time due to the unsteady fluid force on the object. Due to the mutual influence of inertia, flexibility and fluid force, flexible structure and fluid coupling, some characteristics different from those of rigid bodies will appear. The bending stiffness of flexible bodies is generally small. When interacting with fluids, large deformations and displacements will occur with significant nonlinear characteristics, which are very difficult to solve.

[0050] Under the same conditions, the fluttering effect of a hard flag is better than that of a soft flag. A hard rod 5 is placed inside the flag 3. Due to the supporting effect of the hard rod 5, the positional relationship of the entire flag relative to the air outlet 111 is relatively consistent. If the hard rod 5 is not placed, the flag is easy to bend and deform. Under this condition, the airflow is easy to deviate to one side, which aggravates the pressure difference on both sides of the flag 3 and makes the flag 3 easier to fold back. It can be seen that the soft flag is unstable to the airflow disturbance caused by the wind, while the fluttering effect of the hard flag is not good during use and is not light enough. By setting a hard rod 5 with a length less than the width of the flag 3, the fluttering effect of the flag 3 during use is guaranteed, and the airflow on both sides of the flag 3 can be well balanced to avoid rolling, thereby achieving the effect of a hard flag.

[0051] In this embodiment, the flagpole 1 is connected to the foundation 6 via a rotating mechanism 7, which can drive the flagpole 1 to rotate circumferentially, so as to adapt well to the ambient wind and ensure the fluttering effect of the flag 3. The blower 4 includes two starting devices. When working normally, one starting device works and the other is in an idling standby state. When the starting device in use fails and stops working, the other starting device is used. The multi-level redundant structure is used to ensure the continuous and smooth operation of the blower 4, and the risk of unexpected equipment conditions affecting the performance effect is minimized, thereby improving the reliability of the equipment when in use. The system has the advantages of strong operability, safety, and reliability.

[0052] Compared with the prior art, after the hard rod 5 is added to the flag pants of the flag 3, the positional relationship of the entire flag pants relative to the air outlet 111 is relatively consistent, the airflow passes evenly through both sides of the flag pants, and the air pressure on both sides of the flag pants is relatively consistent, so that the flag 3 is more stretched when flying, and the problem of the flag 3 being folded and rolled into the steel wire rope when flying in major performances is effectively solved. When the flag 3 is blown, the flag 3 is more stretched, achieving almost the same effect as when the hard flag is blown. The present invention solves the problems existing in the prior art that the blowing effect of the hard flag is not good when used, the soft flag is easily rolled into the steel wire rope when used, resulting in the inability to fly normally, and the inability to simultaneously meet the requirements of normal flying and stretched and light blowing effects. It has a simple structure, significant effects, and is suitable for wide promotion.

[0053] As another embodiment of the present invention, the structure of this flag blowing system is basically the same as that in the above embodiment, except that the flagpole 1 includes a rod body 11, a blocking member 12, a first pulley, a second pulley, and a locking ratchet, wherein the rod body 11 is connected to the blower 4 and one end is fixed to the foundation 6, an air outlet 111 is arranged on the rod body 11, and the air outlet 111 is arranged away from the foundation 6; the blocking member 12 is arranged at the other end of the rod body 11, and is used to block the air flowing in the rod body 11; the first pulley is rotatably connected to the rod body 11, and is arranged at one end of the rod body 11 close to the blocking member 12; the second pulley is rotatably connected to the rod body 11, and is arranged close to the foundation 6, and the traction rope 2 is arranged between the first pulley and the second pulley; the locking ratchet is connected to the rod body 11 and the traction rope 2 at the same time, and is used to limit the movement of the traction rope 2. The locking ratchet, the first pulley, and the second pulley are all prior art, and no further explanation is given here.

[0054] As another embodiment of the present invention, the structure of this flag blowing system is basically the same as the structure in the above-mentioned embodiment, except that the flag 3 includes a flag body 31, a lock 32, and a windproof chain 33, wherein the flag body 31 is connected to the hard pole 5, and one side of the flag body 31 is provided with a plurality of hook holes 311 arranged side by side, and the hard pole 5 is arranged between the two hook holes 311; the lock 32 is connected to the flag body 31 through the hook hole 311, and is detachably connected to the traction rope 2, and is used to fix the flag body 31 on the traction rope 2; the windproof chain 33 is connected to the traction rope 2, and is put on the flagpole 1.

[0055] As another embodiment of the present invention, the structure of this flag blowing system is basically the same as that in the above embodiment, except that the hard rod 5 is arranged at the lower middle part of the flag body 31; the length of the hard rod 5 is one quarter of the width of the flag body 31. This arrangement ensures that the addition of the hard rod 5 does not affect the transmission, folding, and hanging of the flag 3, and there is no obvious change in the appearance, and does not affect the visual effect. Here, as long as the relevant performance of the hard rod 5 can be achieved, it is within the scope of protection of this application document.

[0056] As another embodiment of the present invention, the structure of this flag blowing system is basically the same as the structure in the above embodiment, the difference is that the windproof chain 33 and the hook hole 311 are arranged one by one, and there are two air outlets 111, one air outlet 111 is arranged at a position opposite to the hard rod 5, and the other air outlet 111 is arranged below the bottom of the flag body 31.

[0057] Please also read Figures 1 to 5 As another embodiment of the present invention, the structure of the flag blowing system is basically the same as that of the above embodiment, except that the air outlet 111 is an opening inclined upwardly arranged on the rod body 11; the lock buckle 32 corresponds to the hook hole 311 one by one, the lock buckle 32 located in the middle of the flag body 31 is vertically arranged with the rod body 11, the angle between the lock buckle 32 located in the upper part of the flag body 31 and the rod body 11 is an obtuse angle, and the angle between the lock buckle 32 located in the lower part of the flag body 31 and the rod body 11 is an acute angle. A hard rod 5 is provided, one end of the hard rod 5 is provided at the midpoint of the side of the flag body 31 close to the rod body 11, and the other end extends in the direction of the foundation 6; there are five hook holes 311, which are equidistantly arranged on the flag body 31, and the hook holes 311 are named as the first hole, the second hole, the third hole, the fourth hole, and the fifth hole from top to bottom, and the hard rod 5 is arranged between the third hole and the fourth hole, which is easy to implement in operation, and the pressure on both sides of the flag body 31 is relatively balanced and stable, and the blowing effect is more ideal. The lock buckle 32 connected to the third hole is perpendicular to the rod body 11, the angle between the lock buckle 32 connected to the first hole and the second hole and the upward direction of the rod body 11 is an obtuse angle, and the angle between the lock buckle 32 arranged upward and the rod body 11 is larger; the angle between the fourth hole and the fifth hole and the upward direction of the rod body 11 is an acute angle, and the angle between the lock buckle 32 arranged downward and the upward direction of the rod body 11 is smaller. This setting method can tighten the flag body 31 well, avoid deformation of the flag body 31, and ensure the fluttering effect.

[0058] Please also read Figures 1 to 10As another embodiment of the present invention, the structure of this flag blowing system is basically the same as that in the above embodiment, except that the flagpole 1 further includes a limit assembly 13 fixedly connected to the pole body 11; the traction rope 2 includes a plurality of traction monomers, the cross section of the traction monomers is rectangular, and can be a cuboid structure, and adjacent traction monomers are rotatably connected, and the adjacent traction monomers can rotate relative to each other with the connection point as the center of the circle, but cannot rotate relative to each other along the circumferential direction of the setting direction of the traction rope 2; the limit assembly 13 is adapted to the traction monomers and is used to limit the circumferential rotation of the traction rope 2. The limit assembly 13 ensures the stable operation of the traction rope 2. During the flag-raising process, the traction rope 2 will only perform the lifting movement and will not rotate, thereby ensuring that one end of the flag 3 will not flip over, and the other end is not easily rolled into the traction rope 2 under the influence of natural wind or the blowing of the blower 4, and the overall operation stability is better.

[0059] In this embodiment, the limiting assembly 13 includes a limiting bracket 131, a limiting block 132, an elastic body 133, a first sensor 134, and a second sensor 135, wherein the limiting bracket 131 is connected to the rod body 11, and the limiting bracket 131 is provided with a through slot 1311, a through hole 1312 and a limiting hole 1313, the through slot 1311 is connected to the limiting hole 1313 and is vertically arranged, the through slot 1311 and the through hole 1312 are parallel to the traction rope 2 and are adaptively arranged, the through hole 1312 is adapted to the traction monomer, the through slot 1311 is adapted to the fixing block 21, and the through hole 1312 is arranged on one side of the through slot 1311; the limiting block 132 is arranged in the limiting hole 1313 and extends into the through hole 1313. In the groove 1311, the limit block 132 is slidably connected with the limit bracket 131, and the limit block 132 is provided with a limit groove 1321 adapted to the traction unit, and the limit block 132 is also provided with a slope 1322 for facilitating the passage of the flag 3; the elastic body 133 is arranged in the limit hole 1313, and is connected to the limit block 132 and the limit bracket 131 at the same time, and the elastic body 133 can be a spring for providing a rebound force for the limit block 132; the first sensor 134 is connected to one end of the limit block 132 close to the limit hole 1313; the second sensor 135 is arranged at one end of the limit hole 1313 away from the limit block 132, and is electrically connected to the first sensor 134 and the blower 4 at the same time, for controlling the opening and closing of the blower 4. The first sensing element 134 and the second sensing element 135 can both be sensors. When the first sensing element 134 and the second sensing element 135 are in contact with each other, the second sensing element 135 outputs a signal to start the blower 4 to the blower 4, and the blower 4 starts blowing air.

[0060] In this embodiment, a plurality of limiter assemblies 13 are provided along the axial direction of the rod body 11; the traction rope 2 also includes a fixing block 21 detachably connected to the flag 3, the fixing block 21 is fixedly connected to a plurality of traction units, the cross sections of both ends of the fixing block 21 are triangular, and are adapted to the limiter 132, and the inclined surface 1322 is adapted to the shape of the fixing block 21. The through slot 1311 is provided corresponding to the fixing block 21. The limiter bracket 131 is provided with a through hole connected to the rod body 11. When the flag is raised, if the fixed block 21 has not moved to contact with the limiting assembly 13, the blower 4 will not work; when the fixed block 21 contacts with the limiting block 132 and pushes the limiting block 132 into the limiting hole 1313, the first sensing member 134 and the second sensing member 135 contact at this time, and the blower 4 starts to blow air to the flag 3, adjust the blowing state of the flag 3 during the lifting and lowering process, and provide power for the flag 3 to float; when the fixed block 21 is separated from the limiting block 132, the blower 4 stops working to save energy; the limiting assembly 13 is provided at a position near the top of the rod body 11, and the limiting assembly 13 at this location can ensure that after the flag 3 is fixed at the top, on the one hand, the connection stability is better, and on the other hand, continuous blowing can be achieved to ensure that even if the natural wind is small, there is a good blowing effect. It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in this field.

[0062] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flag blowing system, characterized in that: include: The flagpole (1) is a tubular structure, and an air outlet (111) is provided on the flagpole (1); A traction rope (2) is arranged on the flagpole (1) and is arranged opposite to the air outlet (111); A flag (3) is connected to the traction rope (2); the air outlet (111) is adapted to be arranged on the flag (3) and is used to blow air to make the flag (3) float; a hard rod (5) is provided on the flag (3); the length of the hard rod (5) is smaller than the width of the flag (3) and is used to control the airflow balance on both sides of the flag (3); A blower (4) connected to the flagpole (1) and used to blow air into the flagpole (1); The flagpole (1) comprises: A rod body (11) is connected to the blower (4) and one end of which is fixed on the foundation (6); the air outlet (111) is arranged on the rod body (11), and the air outlet (111) is arranged away from the foundation (6); The flagpole (1) further comprises a limiting assembly (13) fixedly connected to the pole body (11); the traction rope (2) comprises a plurality of traction units, the cross-section of the traction units is rectangular, and adjacent traction units are rotatably connected; the limiting assembly (13) is adapted to be arranged with the traction units, and is used to limit the traction rope (2) from rotating along the circumferential direction of the traction rope (2); The limiting component (13) comprises: a limiting bracket (131) connected to the rod body (11); the limiting bracket (131) is provided with a through slot (1311), a through hole (1312) and a limiting hole (1313); the through slot (1311) is connected to the through hole (1312) and is vertically arranged; the through slot (1311) and the through hole (1312) are parallel to the traction rope (2) and are adaptively arranged; the through hole (1312) is arranged on one side of the through slot (1311); A limit block (132) is arranged in the through hole (1312) and extends into the through slot (1311); the limit block (132) is slidably connected to the limit bracket (131); a limit groove (1321) adapted to the traction unit is provided on the limit block (132); and an inclined surface (1322) is also provided on the limit block (132) for facilitating the passage of the fixing block (21); an elastic body (133), arranged in the through hole (1312) and connected to the limiting block (132) and the limiting bracket (131), and used for providing a rebound force for the limiting block (132); A first sensing element (134) connected to an end of the limiting block (132) close to the through hole (1312); A second sensing element (135), arranged at one end of the through hole (1312) close to the limit block (132), and electrically connected to the first sensing element (134) and the blower (4), for controlling the opening and closing of the blower (4); A plurality of the limit assemblies (13) are arranged axially along the rod body (11); the traction rope (2) further comprises a fixing block (21), the fixing block (21) is fixedly connected to the plurality of traction units and is detachably connected to the flag (3); the cross-sections of both ends of the fixing block (21) are triangular and are adapted to be arranged with the limit block (132); the inclined surface (1322) is adapted to be arranged with a shape of the fixing block (21); The flag (3) comprises: A flag body (31) is connected to the hard rod (5); a plurality of hook holes (311) are arranged side by side on one side of the flag body (31); and the hard rod (5) is arranged between two of the hook holes (311); A lock buckle (32) connected to the flag body (31) through the hook hole (311) and detachably connected to the traction rope (2), and used for fixing the flag body (31) to the traction rope (2); A windproof chain (33) connected to the traction rope (2) and inserted into the flagpole (1); The air outlet (111) is an opening arranged on the rod body (11) and tilted upward; the lock buckles (32) correspond to the hook holes (311) one by one, the lock buckle (32) located in the middle of the flag body (31) is arranged vertically to the rod body (11), the angle between the lock buckle (32) located at the upper part of the flag body (31) and the rod body (11) is an obtuse angle, and the angle between the lock buckle (32) located at the lower part of the flag body (31) and the rod body (11) is an acute angle.

2. A flag blowing system according to claim 1, characterized in that: The flagpole (1) further comprises: A blocking member (12) is arranged at the other end of the rod body (11) and is used to block the air flowing in the rod body (11); A first pulley, rotatably connected to the rod body (11) and arranged at one end of the rod body (11) close to the blocking member (12); a second pulley, rotatably connected to the rod body (11) and arranged close to the foundation (6), and the traction rope (2) is arranged between the first pulley and the second pulley; A locking ratchet is connected to the rod body (11) and the traction rope (2) and is used to limit the movement of the traction rope (2).

3. A flag blowing system according to claim 2, characterized in that: The hard rod (5) is arranged at a lower middle position of the flag body (31); the length of the hard rod (5) is one quarter of the width of the flag body (31).

4. A flag blowing system according to claim 3, characterized in that: The windproof chains (33) are arranged in one-to-one correspondence with the hook holes (311), and two air outlets (111) are provided, one of the air outlets (111) is arranged at a position opposite to the hard rod (5), and the other of the air outlets (111) is arranged below the bottom of the flag body (31).

5. A flag blowing system according to claim 4, characterized in that: The hard rod (5) is provided with one end thereof being arranged at the midpoint of the flag body (31) on a side close to the rod body (11), and the other end thereof extending in the direction of the foundation (6).

6. A flag blowing system according to claim 5, characterized in that: The hook holes (311) are provided with five holes and are arranged at equal intervals on the flag body (31).

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